refactor: easier commitlint command

[dhensby]

This creates a slightly easier to use commitlint command for contributors to use.

Instead of node_modules/.bin/commitlint --from origin/master --to HEAD contributors can now use npm run lint:commit. PR template updated as well

[codecov]

Codecov Report

Merging #1496 (1385ba7) into master (8b516e9) will decrease coverage by 0.49%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1496      +/-   ##
==========================================
- Coverage   80.68%   80.19%   -0.50%     
==========================================
  Files          91       91              
  Lines        4655     4655              
  Branches      854      854              
==========================================
- Hits         3756     3733      -23     
- Misses        625      649      +24     
+ Partials      274      273       -1     

Impacted Files	Coverage Δ
src/connection.ts	64.07% <0.00%> (-2.00%)	⬇️
src/message-io.ts	90.00% <0.00%> (-1.43%)	⬇️
src/token/handler.ts	55.02% <0.00%> (-0.60%)	⬇️
src/login7-payload.ts	89.74% <0.00%> (-0.52%)	⬇️

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