* Adding default empty string tuple to ensure proper formatting of prompt
2020-07-17 Xie Yanbo <xieyanbogmail.com>
2.2.1
2020-07-03 Stavros Ntentos
* explicitly declare the dependent package prompt-toolkit must be >=2
2020-05-18 Xie Yanbo <xieyanbogmail.com>
* remove selenium's short name s to avoid conflict with command step
2020-05-17 Xie Yanbo <xieyanbogmail.com>
2.2.0
* add Debug If keyword * rename libs' short name from l to ls to avoid conflict with command list
2020-05-09 Xie Yanbo <xieyanbogmail.com>
2.1.0
* add step, next, continue, list and longlist commands
2020-05-03 Xie Yanbo <xieyanbogmail.com>
2.0.0
* drop python 2 and 3.4 support * upgrade prompt-toolkit to 2.x * prompt-toolkit 3 is not compatible with python3.5 * split the huge source file into small pieces * refactory