Add basic melos support

[Sub6Resources]

Fixes #1133

[codecov]

Codecov Report

Base: 51.44% // Head: 49.62% // Decreases project coverage by -1.81% ⚠️

Coverage data is based on head (cd925de) compared to base (ff059b7).
Patch has no changes to coverable lines.

❗ Current head cd925de differs from pull request most recent head e139d7c. Consider uploading reports for the commit e139d7c to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1147      +/-   ##
==========================================
- Coverage   51.44%   49.62%   -1.82%     
==========================================
  Files          17       18       +1     
  Lines        2587     2702     +115     
==========================================
+ Hits         1331     1341      +10     
- Misses       1256     1361     +105     

Impacted Files	Coverage Δ
...ackages/flutter_html_svg/lib/flutter_html_svg.dart	8.69% <0.00%> (ø)

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[Sub6Resources]

The difference in code coverage is because we now are tracking coverage on all the subpackages.

[Sub6Resources]

Merging now!