Add SciML code style badge

[FedericoStra]

This allows to add the badge

to the README.md by including the plugin SciMLStyleBadge() in Template(; plugins = [...]).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.14%. Comparing base (90190be) to head (be67cfb).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #501      +/-   ##
==========================================
+ Coverage   94.11%   94.14%   +0.02%     
==========================================
  Files          24       24              
  Lines         748      751       +3     
==========================================
+ Hits          704      707       +3     
  Misses         44       44              

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[oxinabox]

can you bump the version number?