rulec v0.21.2

Nothing that passed in 0.21.1 fails in 0.21.2, and no answer changes. Only the Japanese wording moves.

Changed

• The Japanese output uses the words the Japanese pages use. Under --lang ja, the diagnostics, rulec explain, the CLI help and the comments in generated code now say ツール for 道具, リクエスト for 要求 where it means a request, ジェネレーター for 生成器, ネスト for 入れ子, ローカル for 手元, and レスポンス for an HTTP answer. A diagnostic quoted on a page and the sentence under it no longer name one thing two ways. The English output is unchanged, and so are the codes and every JSON key.

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One static binary per platform, no runtime; on Linux also as a .deb and an .rpm. Verify a download against SHA256SUMS before running it; the install page says how.