2.0.0

[2.0.0] - 15/02/2021

NOTE: Massive changes here due to the migration to null-safety and laying the foundation for code generation to enable testing Flutter apps using the integration_test package.

BREAKING CHANGE: Migration to null-safety, some parameter have become nullable which may lead to subtle unexpected results. Please file any issue you come across.
BREAKING CHANGE: Table has been renamed to GherkinTable to avoid naming clashes
BREAKING CHANGE: Null-safety updated all libs to their stable null-safety releases
BREAKING CHANGE: exitAfterTestRun configuration option has been removed as it need to import dart:io which is not available under certain environments (dartjs for example).
BREAKING CHANGE: exitAfterTestFailed configuration option renamed to stopAfterTestFailed
BREAKING CHANGE: Reporter->onException() exception parameter is now an object rather than an exception
POSSIBLE BREAKING CHANGE: Feature file discovery has been refactored to abstract it from the external Glob dependency. It now support the three native dart Patterns (String, RegExp & Glob). There is potential here your patterns may not work anymore due as the default IoFeatureFileAccessor assumes the current directory is the working directory to search from. Thanks to @marcin-jelenski for the PR
Execution order can now be sorted alphabetically to ensure a consistent order thanks to @bartonhammond
Fixed #22 Tags are not taking into account after an Example block
Fixed #23: Multiline strings to support YAML format thanks to @tshedor for the PR!
Fixed #29: French keyword "Lorsqu'il" makes parser crash