feat(button): Add an href prop

[wesleyabbey]

Adding a new href prop. This href prop will automatically convert the button into an anchor tag.

See issue #164

[moog16]

@wesleyabbey thanks for opening the PR! Could you please add some unit tests

[moog16]

@wesleyabbey There should be a screenshot test case for this, but I'm pretty sure you cannot do that. I'll try adding it to this PR

[moog16]

Running tests here: #176

@wesleyabbey since I don't have access to your branch, could you please add the code in this commit:
e66d886

[codecov-io]

Codecov Report

Merging #174 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #174      +/-   ##
==========================================
+ Coverage   95.82%   95.82%   +<.01%     
==========================================
  Files          21       21              
  Lines         718      719       +1     
  Branches       66       67       +1     
==========================================
+ Hits          688      689       +1     
  Misses         30       30

Impacted Files	Coverage Δ
packages/button/index.js	93.33% <100%> (+0.47%)	⬆️

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[moog16]

almost there! we have screenshots and unit tests passing in #176.

Looks like there is a yarn.lock change - please remove changes.
Also please add this commit dae79c5

[wesleyabbey]

I'm not sure why that test is failing. Is this an issue on my end?

[moog16]

Not on your end. Its a known issue that we still need to work on. Since #176 passes and you have all the commits, this PR is ready to be merged.

[moog16]

Thanks @wesleyabbey !!