Bump snowballstemmer from 1.2.1 to 2.0.0

[dependabot-preview]

Bumps snowballstemmer from 1.2.1 to 2.0.0.

Changelog

Sourced from snowballstemmer's changelog.

Snowball 2.0.0 (2019-10-02)

C/C++

• Fully handle 4-byte UTF-8 sequences. Previously hop and next handled
  sequences of any length, but commands which look at the character value only
  handled sequences up to length 3. Fixes #89.

• Fix handling of a 3-byte UTF-8 sequence in a grouping in backwardmode.

Java

• TestApp.java:

  • Always use UTF-8 for I/O. Patch from David Corbett (#80).

  • Allow reading input from stdin.

  • Remove rather pointless "stem n times" feature.

  • Only lower case ASCII to match stemwords.c.

  • Stem empty lines too to match stemwords.c.

Code Quality Improvements

• Fix various warnings from newer compilers.

• Improve use of const.

• Share common functions between compiler backends rather than having multiple
  copies of the same code.

• Assorted code clean-up.

• Initialise line_labelled member of struct generator to 0. Previously we were
  invoking undefined behaviour, though in practice it'll be zero initialised on
  most platforms.

New Code Generators

• Add Python generator (#24). Originally written by Yoshiki Shibukawa, with
  additional updates by Dmitry Shachnev.

• Add Javascript generator. Based on JSX generator (#26) written by Yoshiki

... (truncated)

Commits

• See full diff in compare view

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[dependabot-preview]

Superseded by #106.