4.1.1

Special thanks to the contributors that made this release happen: @cjp256, @kenvandine, and @sergiusens

Bug Fixes

• flutter v1 plugin: move pub get to build @kenvandine (#3204)
• tests: add missing asserts to python unit tests @cjp256 (#3206)
• build providers: fix base change warning message @cjp256 (#3202)

Tooling

• spread tests: higher timeout for extension tests @sergiusens (#3205)