Create README.md

Author: estahn

README.md

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+# phpunit-json-assertions
+
+JSON assertions for PHPUnit includes traits/methods to help validate your JSON data through various methods.
+
+## Features
+
+* Validate your JSON data via JSON Schema
+
+## JSON Schema
+
+* describes your existing data format
+* clear, human- and machine-readable documentation
+* complete structural validation, useful for
+** automated testing
+** validating client-submitted data
+
+See more details [here](http://json-schema.org/).
+
+## Install
+### Composer
+
+    composer require estahn/phpunit-json-assertions
+
+## Demo