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• rewrote the "if" and "filter" focusers

• added "=", "!=", "<", ">", "<=", ">=", "&&", "||", "all", "any", "not" focusers

• changed the collecting syntax from "<focuser>" to "%focuser"

• added the "literal" focuser

• added "el", "kv", "key", "val", "atKey", "atIdx" focusers

• switched from internally using scientific to Rational

• fixed "regex" (it was very broken, lol)

• added escaping support to string literals (only \")

• Made slicing more flexible (You can now change the length of focuses)
• Made regex use Perl style regexes

Added --version option

• Changed mapping separator from ">" to ":". ">" was already used in if expressions, and clashed in some cases.

version 0.1.0