Stop depending on pkg:charcode and pkg:pedantic. (#191)

Stop depending on pkg:charcode and pkg:pedantic.

Use pkg:lints instead of pkg:pedantic (and update code as necessary).
Use a local constant instead of depending on pkg:charcode.

Remove unnecessary clutter in analysis_options.yaml, but do retain 
 `analyzer`/`strong-mode`/`implicit-casts: false`
12 files changed
tree: 16fc1f39828f0bcc7e3952b7b72b5f433d2d7a81
  1. .github/
  2. .gitignore
  3. AUTHORS
  4. CHANGELOG.md
  5. CONTRIBUTING.md
  6. LICENSE
  7. README.md
  8. analysis_options.yaml
  9. lib/
  10. pubspec.yaml
  11. test/
README.md

Contains utility classes in the style of dart:async to work with asynchronous computations.