string
The version number of the running janet program.
(print "You are using janet version " janet/version )
(janet/version 0 ) # => 49
(janet/version 1 ) # => 46
(janet/version 2 ) # => 49
(janet/version 3 ) # => 55
(janet/version 4 ) # => 46
(janet/version 5 ) # => 50