Merge pull request #3 from nimbly/3.0

Merge 3.0 into Master

Updating Psalm to latest version.

Updating to latest dev versions.

Adding ServerRequest attributes to pool of resolvable parameters when…

… using DI.

Updating documentation

Adding psalm-suppress for PHP 7.x backwards compatibility.

Check for response body size of null, not just falsey.

Dropping static analysis from CI config.

Adding documentation about `call` method.

Merge pull request #1 from nimbly/1.1-beta

1.1 beta