Update psr/http-factory requirement from ^1.0 to ^1.1

[dependabot[bot]]

Updates the requirements on psr/http-factory to permit the latest version.

Release notes

Sourced from psr/http-factory's releases.

1.1.0

• Includes php-fig/http-factory#17, which is the implementation of this errata: php-fig/fig-standards#1321
• Bumps the requirement to PHP 7.1+

Commits

• 2b4765f Merge pull request #17 from alexandre-daubois/explicit-nullable-type
• 2e735aa Add explicit nullable type and bump minimal PHP version to 7.1
• 7037f4b Merge pull request #15 from localheinz/feature/source
• 0d1c639 Enhancement: Add link to source to composer.json
• 6d70f40 Merge pull request #14 from dbu/patch-1
• 53ff325 improve package description
• e616d01 Merge pull request #13 from ghostwriter/feature/http-message-v2
• 2444358 Support psr/http-message v2
• 5a4f141 Merge pull request #12 from TimWolla/patch-1
• 2464a76 Add .gitattributes setting export-ignore
• Additional commits viewable in compare view

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[coveralls]

coverage: 99.871%. remained the same when pulling dee05e3b518f51357210d3d7716b712d1d42f417 on dependabot/composer/psr/http-factory-tw-1.1 into 3a1dd1deab0ae2bb95c4502389671123689a4892 on master.

[coveralls]

coverage: 99.871%. remained the same when pulling dee05e3b518f51357210d3d7716b712d1d42f417 on dependabot/composer/psr/http-factory-tw-1.1 into 3a1dd1deab0ae2bb95c4502389671123689a4892 on master.