Merge branch 'release/0.2.0' into develop
introduced composer config helper (reading data, modifies the version)
implemented composer config helper
composer update action uses the composerconfig helper
config value object
config value object test
removed config default value
composer config helper can add config to composer.json
added interface for actions
base action implements action interface
extracted a service builder class which resolves the abbreviations to class names
removed handler, reused tests from handlertest for servicebuilder tests
replaced inline version constant with version file
refactored context to use the service builder and some typehints
changed init command not to ask for version generator options (left over from simple versioning removal)
fixed json typo
fixed service builder not injecting context
fixed list names
removed test where service creation was depended of other service
code cleanup