Add emoji 🦎 + small tweaks on readme

[afontcu]

This PR closes #67 🦎

• Add lizard emoji.

I've also tweaked some other things I had in my mind:

• Add linting Markdown files before commit.
• Use markdown link aliases to improve readability.
• Give "more examples" section more prominence.
• Add Spectrum community badge.
• Mention peerDependencies introduced in Bump lodash from 4.17.11 to 4.17.14 #56

[codecov]

Codecov Report

Merging #70 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master    #70   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           1      1           
  Lines          61     61           
  Branches       10     10           
=====================================
  Hits           61     61

---

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 79ad59e...85353a8. Read the comment docs.