Add type defs to Button component

[xdmorgan]

• plus some tests
• bumps react-scripts and typescript deps due to this vs code issue
  • plus, add .vscode/settings.json to specify workspace TS version (not editor's)

[codecov]

Codecov Report

Merging #92 (fcc6811) into main (23c7668) will decrease coverage by 0.07%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #92      +/-   ##
==========================================
- Coverage   65.52%   65.45%   -0.08%     
==========================================
  Files          55       55              
  Lines         525      521       -4     
  Branches      110      106       -4     
==========================================
- Hits          344      341       -3     
+ Misses        173      172       -1     
  Partials        8        8              

Impacted Files	Coverage Δ
src/components/button.tsx	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 23c7668...fcc6811. Read the comment docs.