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Requiring a Minimum Just Version

If you use features of just which require a particular version, you may use the minimum-version1.55.0 setting to make it an error to use older versions of just:

set minimum-version := '1.55.0'

If just encounters a minimum version greater than its own version, it will print an error message with the required version, which is hopefully better than the confused error message it would have otherwise produced.

The minimum-version setting should be placed at the top of the justfile, before any usage of the new feature that it guards.

Any features which change the lexer in forward-incompatible ways will still produce an unhelpful error message, as the minimum version check is implemented in the parser, which runs after the lexer.