chore: Bump flat and eth-gas-reporter (#230)

Bumps [flat](https://github.com/hughsk/flat) and
[eth-gas-reporter](https://github.com/cgewecke/eth-gas-reporter). These
dependencies needed to be updated together.
Updates `flat` from 4.1.1 to 5.0.2
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/hughsk/flat/commit/e5ffd664df8a1fcc05adc22dd0ac6a2b32a0955d"><code>e5ffd66</code></a>
Release 5.0.2</li>
<li><a
href="https://github.com/hughsk/flat/commit/fdb79d537748c827e8b886f897d8e1eb3c1acd17"><code>fdb79d5</code></a>
Update dependencies, refresh lockfile, format with standard.</li>
<li><a
href="https://github.com/hughsk/flat/commit/e52185dded05768a1036327c5e79a399778d9191"><code>e52185d</code></a>
Test against node 14 in CI.</li>
<li><a
href="https://github.com/hughsk/flat/commit/0189cb11dbc942447af78930bcb0ebc132b88384"><code>0189cb1</code></a>
Avoid arrow function syntax.</li>
<li><a
href="https://github.com/hughsk/flat/commit/f25d3a11306bc460e43a14affa64d44a1d3cf8ed"><code>f25d3a1</code></a>
Release 5.0.1</li>
<li><a
href="https://github.com/hughsk/flat/commit/54cc7ad380ebfbdf22e6654934dde5a34fdf3104"><code>54cc7ad</code></a>
use standard formatting</li>
<li><a
href="https://github.com/hughsk/flat/commit/779816e81b6546da12280ee529d78dc57a7a5e1c"><code>779816e</code></a>
drop dependencies</li>
<li><a
href="https://github.com/hughsk/flat/commit/2eea6d3a556feb1bdb02dc2f376c935da59a66e4"><code>2eea6d3</code></a>
Bump lodash from 4.17.15 to 4.17.19</li>
<li><a
href="https://github.com/hughsk/flat/commit/a61a554952cfb550f276acc02ceea403afe01700"><code>a61a554</code></a>
Bump acorn from 7.1.0 to 7.4.0</li>
<li><a
href="https://github.com/hughsk/flat/commit/20ef0ef55dfa028caddaedbcb33efbdb04d18e13"><code>20ef0ef</code></a>
Fix prototype pollution on unflatten</li>
<li>Additional commits viewable in <a
href="https://github.com/hughsk/flat/compare/4.1.1...5.0.2">compare
view</a></li>
</ul>
</details>
<br />

Updates `eth-gas-reporter` from 0.2.25 to 0.2.27
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/cgewecke/eth-gas-reporter/releases">eth-gas-reporter's
releases</a>.</em></p>
<blockquote>
<h2>v0.2.27</h2>
<h2>What's Changed</h2>
<ul>
<li>Remove <code>@​ethersproject/abi</code>, use ethers.utils by <a
href="https://github.com/cgewecke"><code>@​cgewecke</code></a> in <a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/pull/301">cgewecke/eth-gas-reporter#301</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/cgewecke/eth-gas-reporter/compare/v0.2.26...v0.2.27">https://github.com/cgewecke/eth-gas-reporter/compare/v0.2.26...v0.2.27</a></p>
<h2>v0.2.26</h2>
<h2>What's Changed</h2>
<ul>
<li>Update Mocha to v10 by <a
href="https://github.com/frangio"><code>@​frangio</code></a> in <a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/pull/295">cgewecke/eth-gas-reporter#295</a></li>
<li>Bump ethers version by <a
href="https://github.com/ChristopherDedominici"><code>@​ChristopherDedominici</code></a>
in <a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/pull/296">cgewecke/eth-gas-reporter#296</a></li>
<li>Remove unused request package by <a
href="https://github.com/ChristopherDedominici"><code>@​ChristopherDedominici</code></a>
in <a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/pull/297">cgewecke/eth-gas-reporter#297</a></li>
<li>Replace request-promise-native with axios by <a
href="https://github.com/cgewecke"><code>@​cgewecke</code></a> in <a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/pull/299">cgewecke/eth-gas-reporter#299</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a
href="https://github.com/ChristopherDedominici"><code>@​ChristopherDedominici</code></a>
made their first contribution in <a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/pull/296">cgewecke/eth-gas-reporter#296</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/cgewecke/eth-gas-reporter/compare/v0.2.2...v0.2.26">https://github.com/cgewecke/eth-gas-reporter/compare/v0.2.2...v0.2.26</a></p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/cgewecke/eth-gas-reporter/blob/master/CHANGELOG.md">eth-gas-reporter's
changelog</a>.</em></p>
<blockquote>
<h1>0.2.27 / 2023-09-30</h1>
<ul>
<li>Remove <code>@​ethersproject/abi</code>, use ethers.utils instead
(<a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/issues/301">cgewecke/eth-gas-reporter#301</a>)</li>
</ul>
<h1>0.2.26 / 2023-09-29</h1>
<ul>
<li>Replace request-promise-native with axios / avoid default price API
calls (<a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/issues/299">cgewecke/eth-gas-reporter#299</a>)</li>
<li>Remove request package (<a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/issues/297">cgewecke/eth-gas-reporter#297</a>)</li>
<li>Bump ethers version (<a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/issues/296">cgewecke/eth-gas-reporter#296</a>)</li>
<li>Update Mocha to v10 (<a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/issues/295">cgewecke/eth-gas-reporter#295</a>)</li>
</ul>
<h1>0.2.23 / 2021-11-26</h1>
<ul>
<li>Add notes to README about missing price data &amp; remote data
fetching race condition</li>
<li>Add support for multiple gas price tokens (BNB, MATIC, AVAX, HR,
MOVR) (<a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/pull/251">cgewecke/eth-gas-reporter#251</a>)</li>
<li>Make <code>@​codechecks/client</code> peer dep optional (<a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/pull/257">cgewecke/eth-gas-reporter#257</a>)</li>
<li>Update <code>@​solidity-parser/parser</code> to 0.14.0 (<a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/pull/261">cgewecke/eth-gas-reporter#261</a>)</li>
</ul>
<h1>0.2.22 / 2021-03-04</h1>
<ul>
<li>Update <code>@​solidity-parser/parser</code> to ^0.12.0 (support
Panic keyword in catch blocks) (<a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/issues/243">cgewecke/eth-gas-reporter#243</a>)</li>
</ul>
<h1>0.2.21 / 2021-02-16</h1>
<ul>
<li>Fix missing truffle migration deployments data (<a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/issues/240">cgewecke/eth-gas-reporter#240</a>)</li>
<li>Upgrade solidity-parser/parser to 0.11.1 (<a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/issues/239">cgewecke/eth-gas-reporter#239</a>)</li>
</ul>
<h1>0.2.20 / 2020-12-01</h1>
<ul>
<li>Add support for remote contracts data pre-loading
(hardhat-gas-reporter feature)</li>
</ul>
<h1>0.2.19 / 2020-10-29</h1>
<ul>
<li>Delegate contract loading/parsing to artifactor &amp; make optional
(<a
href="https://redirect.github.com/cgewecke/eth-gas-reporter/issues/227">#227</a>)</li>
</ul>
<h1>0.2.18 / 2020-10-13</h1>
<ul>
<li>Support multiple codechecks reports per CI run</li>
<li>Add CI error threshold options: maxMethodDiff,
maxDeploymentDiff</li>
<li>Add async collection methods for BuidlerEVM</li>
<li>Update solidity-parser/parser to 0.8.0 (contribution: <a
href="https://github.com/vicnaum"><code>@​vicnaum</code></a>)</li>
<li>Update dev deps / use Node 12 in CI</li>
</ul>
<h1>0.2.17 / 2020-04-13</h1>
<ul>
<li>Use <code>@​solidity-parser/parser</code> for better solc 0.6.x
parsing</li>
<li>Upgrade Mocha to ^7.1.1 (to remove minimist vuln warning)</li>
<li>Stop crashing when parser or ABI Encoder fails</li>
<li>Update <code>@​ethersproject/abi</code> to ^5.0.0-beta.146 (and
unpin)</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a
href="https://github.com/cgewecke/eth-gas-reporter/commits/v0.2.27">compare
view</a></li>
</ul>
</details>
<br />


Dependabot will resolve any conflicts with this PR as long as you don't
alter it yourself. You can also trigger a rebase manually by commenting
`@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits
that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after
your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge
and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating
it. You can achieve the same result by closing it manually
- `@dependabot show <dependency name> ignore conditions` will show all
of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop
Dependabot creating any more for this major version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop
Dependabot creating any more for this minor version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop
Dependabot creating any more for this dependency (unless you reopen the
PR or upgrade to it yourself)
You can disable automated security fix PRs for this repo from the
[Security Alerts
page](https://github.com/celestiaorg/blobstream-contracts/network/alerts).

</details>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>