1.1.1

• 93bd8d1 - Add support for notBlank assertion
• 6cd5128 - Add keyExists and keyNotExists assertions to README
• 0f572b7 - Next-gen coding standard workflow
• 7c55c22 - Update dependency slevomat/coding-standard to v8.12.0
• c5735e1 - Update dependency slevomat/coding-standard to v8.11.1
• 3fe9adc - Update dependency slevomat/coding-standard to v8.11.0
• 6939925 - Update build-cs
• 2d9023a - Update dependency slevomat/coding-standard to v8.9.0
• a75101c - Update PHPCS
• 7601ee9 - Update metcalfc/changelog-generator action to v4.1.0