Setup prettier

[brandondoran]

• Add prettier for formatting and configures to use as eslint plugin.
• Use husky and lint-staged to fix lint and prettier issues with pre-commit hook

[codecov-io]

Codecov Report

Merging #81 into master will not change coverage by %.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master       #81   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            3         3           
  Lines           74        74           
  Branches        19        18    -1     
=========================================
  Hits            74        74           

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