drop support for Node v4

[maxbeatty]

BREAKING CHANGE closes #282

thanks to rework in #302 switched to node-tap for tests which gives us all the same features in ~30% less LOC

• upgrade dependencies
• remove examples (need to be better)
• don't change anything meaningful in lib/ (regex change was prompted by standard)

[coveralls]

Coverage remained the same at 100.0% when pulling 992d241 on node10 into 1945a05 on master.

[maxbeatty]

Can anyone with access to a Windows machine take a look at the failing CLI test? Maybe @zenflow since you originally helped add tests for appveyor?

[zenflow]

@maxbeatty Sure, would be a pleasure 👍 I can do this in a couple days

[zenflow]

Hmm. The tests work fine on my local machine..

C:\Users\Matt\Documents\dev\dotenv>npm t

> dotenv@5.0.1 pretest C:\Users\Matt\Documents\dev\dotenv
> npm run lint


> dotenv@5.0.1 lint C:\Users\Matt\Documents\dev\dotenv
> standard


> dotenv@5.0.1 postlint C:\Users\Matt\Documents\dev\dotenv
> npm run lint-md


> dotenv@5.0.1 lint-md C:\Users\Matt\Documents\dev\dotenv
> standard-markdown




> dotenv@5.0.1 test C:\Users\Matt\Documents\dev\dotenv
> tap tests/*.js --100

tests/test-cli-options.js ............................. 1/1 2s
tests/test-config-cli.js .............................. 1/1 2s
tests/test-config.js ................................ 13/13
tests/test-parse.js ................................. 16/16
total ............................................... 31/31

  31 passing (7s)

  ok
----------------------|----------|----------|----------|----------|-------------------|
File                  |  % Stmts | % Branch |  % Funcs |  % Lines | Uncovered Line #s |
----------------------|----------|----------|----------|----------|-------------------|
All files             |      100 |      100 |      100 |      100 |                   |
 lib                  |      100 |      100 |      100 |      100 |                   |
  cli-options.js      |      100 |      100 |      100 |      100 |                   |
  main.js             |      100 |      100 |      100 |      100 |                   |
 tests                |      100 |      100 |      100 |      100 |                   |
  test-cli-options.js |      100 |      100 |      100 |      100 |                   |
  test-config-cli.js  |      100 |      100 |      100 |      100 |                   |
  test-config.js      |      100 |      100 |      100 |      100 |                   |
  test-parse.js       |      100 |      100 |      100 |      100 |                   |
----------------------|----------|----------|----------|----------|-------------------|

C:\Users\Matt\Documents\dev\dotenv>node -v
v9.11.1

C:\Users\Matt\Documents\dev\dotenv>cmd -v
Microsoft Windows [Version 10.0.16299.371]
(c) 2017 Microsoft Corporation. All rights reserved.

Let me investigate some more...

[motdotla]

👍 thanks Max