v12.0.0

Breaking change: create new script name unix-shell-script-kit because it's easier to understand for more developers.

Add random_char functions:

• random_char
• random_char_alnum
• random_char_alpha
• random_char_blank
• random_char_cntrl
• random_char_digit
• random_char_graph
• random_char_lower
• random_char_lower_digit
• random_char_upper
• random_char_upper_digit
• random_char_print
• random_char_space
• random_char_xdigit