[MRG + 1] Update contributor's guide with new labels

[johnnymetz]

New labels are help wanted and good first issue

[vinayak-mehta]

LGTM.

[vinayak-mehta]

@johnnymetz Can you also update the CONTRIBUTING.md?

[johnnymetz]

@vinayak-mehta CONTRIBUTING.md is the one file I updated. Is there something else?

[johnnymetz]

I need to update the labels in the docs. Should be done in a minute.

[codecov-io]

Codecov Report

Merging #116 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #116   +/-   ##
=======================================
  Coverage   65.31%   65.31%           
=======================================
  Files          12       12           
  Lines        1231     1231           
  Branches      292      292           
=======================================
  Hits          804      804           
  Misses        389      389           
  Partials       38       38

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[vinayak-mehta]

@vinayak-mehta CONTRIBUTING.md is the one file I updated. Is there something else?

Oops, I was referring to the one in the docs. I see that you've updated it. LGTM, merging.

[vinayak-mehta]

@johnnymetz Thanks for the contribution!