Adding support version ^2.0 for psr/http-message

[jjpastor3]

Adding support version ^2.0 for psr/http-message

WHY are these changes introduced?

Fixes #273

I tried to install bundle in one of my projects but I can not because I have psr/http-message in version ^2.0

WHAT is this pull request doing?

Now we can use for version ^2.0

Type of change

• Patch: Bug (non-breaking change which fixes an issue)
• [ x] Minor: New feature (non-breaking change which adds functionality)
• Major: Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• I have added a changelog entry, prefixed by the type of change noted above
• I have added/updated tests for this change
• I have updated the documentation for public APIs from the library (if applicable)

[tanseercena]

@jjpastor3 Can you please Sign CLA and merge this PR as we need it on urgent basis for our app :)
Thanks

[vivere-dally]

Hello, please merge this or #330.

[paulomarg]

Hey folks! Sorry for the big delay here. I've merged #330 which does the same thing, hopefully that fixes the issues you were having!