Add spec for JSON:API 1.1, run tests with normative statements

Author: Art4

tests/Functional/ParsingTest.php

@@ -659,4 +659,16 @@ public function testParseNormativeStatementsForVersion10Correctly(): void
         $this->assertCount(6, $document->get('data')->getKeys());
         $this->assertCount(184, $document->get('included')->getKeys());
     }
+
+    public function testParseNormativeStatementsForVersion11Correctly(): void
+    {
+        $string = $this->getJsonString('format_1.1/normative-statements.json');
+        $document = Parser::parseResponseString($string);
+
+        $this->assertInstanceOf('Art4\JsonApiClient\V1\Document', $document);
+        $this->assertSame(['data', 'included', 'jsonapi'], $document->getKeys());
+        $this->assertSame('1.1', $document->get('jsonapi.version'));
+        $this->assertCount(6, $document->get('data')->getKeys());
+        $this->assertCount(188, $document->get('included')->getKeys());
+    }
 }

tests/files/format_1.0/README.md

@@ -1,3 +1,5 @@
 # JSON:API spec version 1.0
 
 Source: https://github.com/json-api/json-api/tree/v1.1/_format/1.0
+
+The file  `normative-statements.json` has been modified to contain only valid JSON.

tests/files/format_1.1/README.md

@@ -0,0 +1,5 @@
+# JSON:API spec version 1.1
+
+Source: https://github.com/json-api/json-api/tree/v1.1/_format/1.1
+
+The file  `normative-statements.json` has been modified to contain only valid JSON.