Jennifer Thakar 247cb3d816 Update dependencies to null-safe versions
This also replaces package_resolver with package_config, since
package_resolver is archived and is incompatible with null-safe Dart
packages.
2021-04-12 17:31:09 -07:00
..
2019-09-11 12:12:44 -07:00
2019-09-11 12:12:44 -07:00