dartxx 0.5.4

A new Flutter package project.

[0.5.0+2]

• Minor version bump

[0.5.0+1]

• Bump minor

[0.4.5-nullsafety.8]

• Adding lastOr

[0.4.5-nullsafety.7]

• Fixing wrong parameter for closure

[0.4.5-nullsafety.6]

• more ext

[0.4.5-nullsafety.5]

• migrating debounce and Type extensions

[0.4.5-nullsafety.4]

• Updating tests and lib Updating with more extensions

[0.4.5-nullsafety.3]

• Removing extension

[0.4.5-nullsafety.2]

• initial checkin

[0.4.5-nullsafety.1]

• Pre-release Gemfile.local Fixed name overlap

[0.4.4+6]

• Adding extensions

[0.4.4+5]

• Fixing comp error on tets

[0.4.4+4]

• Adding analysis_options.dart

[0.4.4+3]

• Adding some extensions

[0.4.4+2]

• Adding tests

[0.4.4+1]

• null-safety

[0.0.1] - TODO: Add release date.

• TODO: Describe initial release.