v3.1.0

e98776f - fix: typo in filename
8158cd0 - feat: add Visibility question
8c44040 - feat: remove deprecated features (atTheViewportCenter() and butClearsTheFieldBefore())
6516f66 - fix: add log message to Repeat Task
008f129 - feat: implement group task to use results of a Task for multiple other Tasks in the task chain
41dcda5 - fix: add GEM file for local doc server
86df025 - feat: remove deprecated Assertions
3a352a9 - docs: update rest ability configuration
cf2b67d - feat: add descriptions to all assertion functions
f3cdfc5 - docs: update pages to work with floating toc
f98010b - docs: update pages to work with floating toc
a52dfb3 - fix: layout after theme update