Update dependency encoding-japanese to v2

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
encoding-japanese	^1.0.30 -> ^2.0.0

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Release Notes

polygonplanet/encoding.js (encoding-japanese)

v2.2.0

Compare Source

Features

• Add fallback: 'ignore' option in Encoding.convert. (#​41) Thanks @​syumai
• Add fallback: 'error' option in Encoding.convert. (#​44)

Maintenance

• Update devDependencies (mocha) to the latest versions. (a7bded8)

Documentation

• Update fallback option of convert in README.md (2a522ea)

v2.1.0

Compare Source

Changes

• Remove output source map encoding.min.js.map from bundles to simplify build and reduce distribution size. (b963656)

CI

• Migrate CI from Travis CI (.travis.yml) to GitHub Actions (.github/workflows/ci.yml). (8c4612e)

Maintenance

• Update devDependencies (eslint, mocha, uglify-js) to the latest versions. (f092635)

Documentation

• Update API documents (
  detect
convert,
  urlEncode/urlDecode,
  base64Encode/base64Decode,
  codeToString/stringToCode,
  Japanese Zenkaku/Hankaku conversion
  ) in README.md.
• Update CDN sections and add example CDN script tag in README.md. (f2aaefd)
• Change example code from XMLHttpRequest to use fetch API in README.md. (fd88f12)

v2.0.0

Compare Source

Features

• Add fallback option to Encoding.convert. (5622bfa) Thanks #​23 by @​tohutohu, fallback types by @​p-chan
• Add Encoding.version. (bd3d6ef)

Bug Fixes

• Fix deprecated Buffer constructor. (b8fda07)

Breaking Changes

• Drop bower support. (981ea39)

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