Pana maintainance

[passsy]

Drastically improve the the pub score by switching to /// comments and adding all pedantic rules

[codecov]

Codecov Report

Merging #92 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #92   +/-   ##
=======================================
  Coverage   99.84%   99.84%           
=======================================
  Files          41       41           
  Lines        1891     1891           
=======================================
  Hits         1888     1888           
  Misses          3        3

Impacted Files	Coverage Δ
lib/src/collection/kt_map.dart	100% <ø> (ø)	⬆️
lib/src/collection/kt_set.dart	100% <ø> (ø)	⬆️
...src/collection/extension/list_extension_mixin.dart	100% <ø> (ø)	⬆️
lib/src/collection/tuples.dart	100% <ø> (ø)	⬆️
lib/src/collection/collections.dart	100% <ø> (ø)	⬆️
lib/src/collection/comparisons.dart	100% <ø> (ø)	⬆️
lib/src/collection/kt_list.dart	100% <ø> (ø)	⬆️
lib/src/collection/kt_list_mutable.dart	100% <ø> (ø)	⬆️
lib/src/annotation/annotations.dart	100% <ø> (ø)	⬆️
...collection/extension/iterable_extension_mixin.dart	99.58% <ø> (ø)	⬆️
... and 4 more

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