Bump psr/http-message from 1.0 to 1.0.1

[dependabot-preview]

Bumps psr/http-message from 1.0 to 1.0.1.

Changelog

Sourced from psr/http-message's changelog.

1.0.1 - 2016-08-06

Added

• Nothing.

Deprecated

• Nothing.

Removed

• Nothing.

Fixed

• Updated all [**return**](https://github.com/return) self annotation references in interfaces to use
  [**return**](https://github.com/return) static, which more closelly follows the semantics of the
  specification.
• Updated the MessageInterface::getHeaders() return annotation to use the
  value string[][], indicating the format is a nested array of strings.
• Updated the [**link**](https://github.com/link) annotation for RequestInterface::withRequestTarget()
  to point to the correct section of RFC 7230.
• Updated the ServerRequestInterface::withUploadedFiles() parameter annotation
  to add the parameter name ($uploadedFiles).
• Updated a [**throws**](https://github.com/throws) annotation for the UploadedFileInterface::moveTo()
  method to correctly reference the method parameter (it was referencing an
  incorrect parameter name previously).

1.0.0 - 2016-05-18

Initial stable release; reflects accepted PSR-7 specification.

Commits

• f6561bf Added CHANGELOG for 1.0.1
• 14b9b81 Merge pull request #50 from localheinz/fix/return
• d0aabc0 Fix docblock to specify that it should be an array of nested strings, not jus...
• 4958c4a Merge pull request #45 from mindplay-dk/patch-1
• 644d5ee Merge pull request #74 from easy-system/patch-3
• c05524a Merge pull request #69 from mouhamed/patch-1
• 13fb8c3 Merge pull request #70 from cxj/patch-1
• d9723e4 Merge pull request #61 from creocoder/patch-1
• 1534e52 Update RequestInterface.php
• c2290af Add homepage.
• Additional commits viewable in compare view

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