Fix leaflet retina

[landonreed]

This PR conditionally adds the leaflet prop detectRetina, which is used to fetch different sized tiles. It was causing labels to appear very small in retina displays.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 11.37%. Comparing base (88f94e1) to head (177a56e).
Report is 6727 commits behind head on master.

Files with missing lines	Patch %	Lines
lib/components/map/base-map.js	0.00%	3 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #168      +/-   ##
==========================================
- Coverage   11.38%   11.37%   -0.01%     
==========================================
  Files         133      133              
  Lines        6142     6145       +3     
  Branches     1775     1778       +3     
==========================================
  Hits          699      699              
- Misses       4621     4623       +2     
- Partials      822      823       +1     

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[landonreed]

🎉 This PR is included in version 0.13.7 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[landonreed]

🎉 This PR is included in version 1.0.0-alpha.4 🎉

The release is available on:

• npm package (@alpha dist-tag)
• GitHub release

Your semantic-release bot 📦🚀