Bump snowballstemmer from 2.1.0 to 2.2.0

[dependabot[bot]]

Bumps snowballstemmer from 2.1.0 to 2.2.0.

Changelog

Sourced from snowballstemmer's changelog.

Snowball 2.2.0 (2021-11-10)

New Code Generators

• Add Ada generator from Stephane Carrez (#135).

Javascript

• Fix generated code to use integer division rather than floating point division.

  Noted by David Corbett.

Pascal

• Fix code generated for division. Previously real division was used and the generated code would fail to compile with a "Incompatible types" error.

  Noted by David Corbett.

• Fix code generated for Snowball's minint and maxint constant.

Python

• Python 2 is no longer actively supported, as proposed on the mailing list: https://lists.tartarus.org/pipermail/snowball-discuss/2021-August/001721.html

• Fix code generated for division. Previously the Python code we generated used integer division but rounded negative fractions towards negative infinity rather than zero under Python 2, and under Python 3 used floating point division.

  Noted by David Corbett.

Code Quality Improvements

• C#: An among without functions is now generated as static and groupings are now generated as constant. Patches from James Turner in #146 and #147.

Code generation improvements

• General:

... (truncated)

Commits

• 48a67a2 Update for 2.2.0
• ec00981 Fix handling of len and lenof as names
• 5559db7 Report clearer error if = is used instead of ==
• 4ff3598 Optimise constant numeric expressions
• 40b1641 NEWS: Update
• f89c3b9 Fix $(EXE_EXT) to $(EXEEXT)
• 55fd44b Ada: Fix code generated for minint and maxint
• e6d8b6f Pascal: Fix code generated for minint
• ed32a1d Ada: Fix "parentheses required for unary minus" errors
• 47773b9 NEWS: Update
• Additional commits viewable in compare view

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