test: add the test case for invalid address

[Kynea0b]

Description

Added an error test when specifying an invalid address

Checklist:

• I followed the contributing guidelines and code of conduct.
• I have added a relevant changelog to CHANGELOG.md
• I have added tests to cover my changes.
• I have updated the documentation accordingly. (not needed)
• I have updated API documentation client/docs/swagger-ui/swagger.yaml (not needed)

[codecov]

Codecov Report

Merging #88 (d4c7dfc) into main (00c6a22) will increase coverage by 0.12%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #88      +/-   ##
==========================================
+ Coverage   63.25%   63.37%   +0.12%     
==========================================
  Files          80       80              
  Lines        9994     9994              
==========================================
+ Hits         6322     6334      +12     
+ Misses       3345     3337       -8     
+ Partials      327      323       -4     

see 2 files with indirect coverage changes

[170210]

I think it's necessary to have the same test cases in "TestQueryContractInfo" and "TestQueryContractHistory" as well.

[loloicci]

How about using https://pkg.go.dev/github.com/stretchr/testify/assert#ErrorContains to compare errors and not import bech32 error type?

[Kynea0b]

@loloicci
Thank you for your advice. I considered it. This test can be done without importing bech32 in this file if ErrorContaions is used, but equal test is more reliable. Error checking is fine as is. Also, since it was already imported with go.mod, there was no need to stick to not importing. So I will leave it as is.
https://github.com/Finschia/wasmd/blob/main/go.mod#L54

[Kynea0b]

Commits other than the ones below are unsquashed merge commits from other PR.
6e2e797
8b6ceb9
0b3c700