chore: release version v2.1.0

Author: hacdias

CHANGELOG.md

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+# [2.1.0](https://github.com/multiformats/js-multicodec/compare/v2.0.4...v2.1.0) (2020-12-11)
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+### Reverts
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+* Revert "Revert "feat: add ts types (#70)"" ([c19b337](https://github.com/multiformats/js-multicodec/commit/c19b3377bb2c54d539e6700fda2d486efcfb7372)), closes [#70](https://github.com/multiformats/js-multicodec/issues/70)
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 ## [2.0.4](https://github.com/multiformats/js-multicodec/compare/v2.0.3...v2.0.4) (2020-12-11)