Unreleased Changes
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1.5.1 (2022-07-19)
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* Issue - Fix performance regression when checking if `aws-crt` is available. (#2729)

1.5.0 (2022-04-20)
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* Feature - Use CRT based signers if `aws-crt` is available - provides support for `sigv4a`.

1.4.0 (2021-09-02)
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* Feature - add `signing_algorithm` option with `sigv4` default.

1.3.0 (2021-09-01)
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* Feature - AWS SDK for Ruby no longer supports Ruby runtime versions 1.9, 2.0, 2.1, and 2.2.

1.2.4 (2021-07-08)
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* Issue - Fix usage of `:uri_escape_path` and `:apply_checksum_header` in `Signer`.

1.2.3 (2021-03-04)
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* Issue - Include LICENSE, CHANGELOG, and VERSION files with this gem.

1.2.2 (2020-08-13)
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* Issue - Sort query params with same names by value when signing. (#2376)

1.2.1 (2020-06-24)
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* Issue - Don't overwrite `host` header in sigv4 signer if given.

1.2.0 (2020-06-17)
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* Feature - Bump `aws-eventstream` dependency to `~> 1`.

1.1.4 (2020-05-28)
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* Issue - Don't use `expect` header to compute Signature.

1.1.3 (2020-04-27)
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* Issue - Don't rely on the set? method of credentials.

1.1.2 (2020-04-17)
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* Issue - Raise errors when credentials are not set (nil or empty)

1.1.1 (2020-02-26)
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* Issue - Handle signing for unknown protocols and default ports.

1.1.0 (2019-03-13)
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* Feature - Support signature V4 signing per event.

1.0.3 (2018-06-28)
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* Issue - Reduce memory allocation when generating signatures.

1.0.2 (2018-02-21)
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* Issue - Fix Ruby warning: shadowed local variable "headers".

1.0.2 (2017-08-31)
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* Issue - Update `aws-sigv4` gemspec metadata.

1.0.1 (2017-07-12)
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* Issue - Make UTF-8 encoding explicit in spec test.


1.0.0 (2016-11-08)
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* Feature - Initial release of the `aws-sigv4` gem.