Modernizr 3.7.0

Not a full year in the making but close. Lots of new feature detects and more bugfixes then we can write down

New Feature Detect(s)

@abrad1212 added detect for the GetBattery API #2312
@mAiNiNfEcTiOn @Kruithne @rejas added css custom properties feature detection #2310
@rejas added detect for font display #2323
@rejas added test for text-decoration-skip-ink #2324
@andreacc added detection for formNoValidate attribute on inputs #2164
@rejas added detect for box-decoration-break #2330
@haraldreingruber added Media Source Extension API feature dectection #2233
@JordyvanDortmont added audio autoplay feature detect #2185
@rejas added more tests around text decoration styling #2327
@dutchenkoOleg added Intersection Observer API #2360
@escodel added feature detection for navigator.connection.effectiveType #2381
@escodel added PublicKeyCredential feature detect for webauthn #2393

Fixes

Contributions by @emilio, @rejas, @jsoref, @mhadam, @annevk, @andreacc, @steffenweber, @gregersrygg, @anenviousguest, @niksy, @mreinstein, @snout-o, @Nicholas-Eng, @nali, @chris13524 and @odysseuscm which all provided fixes for this release