v2.6.4

Added assertions

• e164 - The international public telecommunication numbering plan
• interfaceExists
• ip / ipv4 / ipv6
• keyNotExists
• null
• satisfy - Allows for a bespoke assertion, rather than a predefined one.

Fixes

• Improved the reporting of the value for min and max assertions.

Other changes

• Removed composer.lock file from library
• Improved travis build to detect incorrect documentation changes

v2.6.3

Added Assert\Assertion::notInArray().
Made Assert\Assertion::INVALID_GREATER_OR_EQUAL unique.
Introduced CONTRIBUTING.md to get contributors to generate the docblocks when a new assertion is added.
Introduced .editorconfig to allow IDEs that support EditorConfig to provide a consistent code style. See EditorConfig for further details.
Additional tests and updated documentation.
Travis updates.

v2.5.1: Merge pull request #147 from rquadling/master

Add missing assertion docblock entries.