Use PHP short array syntax, converted with https://github.com/thomasbachem/php-short-array-syntax-converter .
Fixed unused use statements with php-cs-fixer.
Initial commit of 'Data is empty' condition with unit test.
Merge pull request #69 from paranojik/8.x-3.x-dataIsEmpty

#2281081 - Port "Data value is empty (data_is_empty)" condition to 8.x
Move documentation to separate repository.
Merge pull request #70 from fubhy/move-docs

Move documentation to separate repository.
Implementation of the List count comparison condition.
Merge pull request #73 from paranojik/8.x-3.x-listCountIs

Implementation of the List count comparison condition.
Replacing 'op' abbreviation with 'operator' in ListCountIs condition plugin.
Issue #2245039 : Implemented data selector application in RulesState.
Implemented a variable providing test condition, including test case.
Moved provided context variable methods to the interface and fixed unit test.
Merge pull request #74 from fubhy/dont-use-abbrevations

Replacing 'op' abbreviation with 'operator' in ListCountIs condition plugin.
Renamed parameter_mapping to context_mapping to have the same as Drupal core does.
Implemented a provided variable name mapping for the rules state.
Converting DrupalMessageTest to a unit test.
Merge pull request #75 from fubhy/drupal-message-action

Converting DrupalMessageTest to a unit test.
Fixing typos and copy&paste screw ups.
Adding test case for DrupalMessage::summary().