v1.4.0

BASED ON: behave v1.4.0 (as pre-release)

• Support behave >= 1.3.1 for python >= 3.10
• Support Python >= 3.10 (or newer)
• Drop support for Python 2.7
• Drop support for Python 3.9 (and below)

CLEANUP:

• Remove unicode-string prefix, like: u"Hello"
• Remove usage of six package
• Remove config-logic for Python 2.7 and earlier Python3 versions