125b4e945e
Closes https://github.com/flutter/flutter/issues/158012. This is (effectively) a user-facing NOP, which is exchanging an on-by-default command-line argument (`--implicit-pubspec-resolution`) for an off-by-default global feature flag (`explicit-package-dependencies`). It matches the mental model better, is less painstaking to maintain and feed throughout, and will be easier to globally flip on/off in a future PR. --------- Co-authored-by: Andrew Kolos <andrewrkolos@gmail.com>