Update sly requirement from >=0.4 to >=0.5

[dependabot]

Updates the requirements on sly to permit the latest version.

Changelog

Sourced from sly's changelog.

Version 0.5

10/25/2022 IMPORTANT NOTE This is the last release to be made on PyPi. If you want the latest version go to https://github.com/dabeaz/sly.

09/06/2022 Modernization of the packaging infrastructure. Slight project reorganization.

03/25/2022 Added automatic location tracking to the parser. Use Parser.line_position(value) to return the line number and Parser.index_position(value) to return a (start, end) index pair. value is any object returned by one of the various methods in the parser definition. Typically, it would be a AST node. The parser tracks the data using the value of id(value).

03/25/2022 Added .end attribute to tokens that specify the ending index of the matching text. This is used to do more precise location tracking for the purpose of issuing more useful error messages.

05/09/2020 Experimental support for EBNF choices. For example:

    @('term { PLUS|MINUS term }')
          def expr(self, p):
              lterm = p.pterm0
              for op, rterm in p[1]:
        lterm = BinOp(op, lterm, rterm)
   One issue here is just how one refers to the choice
   of values.  There is no unified name to pick. So,
   you basically have to do it using a numeric index like p[1].
   In this case, p[1] is a list of all of the repeated items
   (represented as tuples).

05/09/2020 Changed the internal names used for EBNF rules to make them a bit easier to debug in the parser.out file.

Version 0.4

03/06/2020 Added experimental support for EBNF repetition and optional syntax. For example, here is a rule for a comma-separated expression list:

           @('expr { COMMA expr }')
           def exprlist(self, p):
               return [ p.expr0 ] + p.expr1

... (truncated)

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