Fixes lower version constraints on guzzlehttp/psr7

• Create DecoratedCachingStream and TellZeroStream

• Drop php7 support
• Require guzzlehttp/psr7 2.0 or above (drop 1.9)
• Require zbateson/mb-wrapper 2.0 or above
• Update to latest PHPStan and PHPCSFixer by @phpfui in #17
• Change text in php source to comment by @svenbw in #18

New Contributors

• @svenbw made their first contribution in #18

Full Changelog: 1.2.1...2.0.0

Reverted update to new Psr\Http\Message\StreamInterface spec to keep with guzzlehttp/psr7's psr/http-message dependency requirements, which support 1.1 and 2.0. Fixes #16

Full Changelog: 1.2.0...1.2.1

What's Changed

• Update to new Psr\Http\Message\StreamInterface spec
• Drop PHP 7.1 support
• Update to PHPUnit <10
• Use PhpCsFixer.php from mb-wrapper project. mail-mime-parser needs separate setting do to __set hack.
• This and mb-wrapper PR can be merged without a release, as they are dev only changes.

All changes thanks to @phpfui once again!

Full Changelog: 1.1.0...1.2.0

What's Changed

• Drop PHP 5.4 to 7.0 support
• PHP CS Fixer by @phpfui in #11
• Modernize to PHP 7.1 by @phpfui in #12

Full Changelog: 1.0.8...1.1.0

What's Changed

• PHP 8.2 support by @phpfui in #10

New Contributors

• @phpfui made their first contribution in #10

Full Changelog: 1.0.7...1.0.8

What's Changed

• update travis badge to github action badge by @Nielsvanpach in #6
• run test suite with php 8.1 by @Nielsvanpach in #7
• Fix PHP 8.1 return type deprecation notices. by @alexei-bykovski in #9

New Contributors

• @alexei-bykovski made their first contribution in #9

Full Changelog: 1.0.6...1.0.7

Update to fix the dependency version and not allow psr7 less than 1.7

Adds support for guzzlehttp/psr7 v2, thanks to @Nielsvanpach