Adding support for complex GraphQL types in "outputType" parameter

Currently, the "outputType" parameter of the Field/Query/Mutation annotations only supports Scalar or ObjectType.
We should instead support all possible types in the GraphQL syntax.

For instance:

```
@field(outputType="[User!]!")
```

This first commit contains a failing test showcasing the issue.

Author: moufmouf

src/FieldsBuilder.php

@@ -524,11 +524,6 @@ private function mapParameters(array $refParameters, DocBlock $docBlock): array
         return $args;
     }
 
-    /**
-     * @param Type $type
-     * @param Type|null $docBlockType
-     * @return GraphQLType
-     */
     private function mapType(Type $type, ?Type $docBlockType, bool $isNullable, bool $mapToInputType): GraphQLType
     {
         $graphQlType = null;

tests/FieldsBuilderTest.php

@@ -55,7 +55,7 @@ public function testQueryProvider()
 
         $queries = $queryProvider->getQueries($controller);
 
-        $this->assertCount(6, $queries);
+        $this->assertCount(7, $queries);
         $usersQuery = $queries[0];
         $this->assertSame('test', $usersQuery->name);
 
@@ -146,12 +146,29 @@ public function testQueryProviderWithFixedReturnType()
 
         $queries = $queryProvider->getQueries($controller);
 
-        $this->assertCount(6, $queries);
+        $this->assertCount(7, $queries);
         $fixedQuery = $queries[1];
 
         $this->assertInstanceOf(IDType::class, $fixedQuery->getType());
     }
 
+    public function testQueryProviderWithComplexFixedReturnType()
+    {
+        $controller = new TestController();
+
+        $queryProvider = $this->buildFieldsBuilder();
+
+        $queries = $queryProvider->getQueries($controller);
+
+        $this->assertCount(7, $queries);
+        $fixedQuery = $queries[6];
+
+        $this->assertInstanceOf(NonNull::class, $fixedQuery->getType());
+        $this->assertInstanceOf(ListOfType::class, $fixedQuery->getType()->getWrappedType());
+        $this->assertInstanceOf(NonNull::class, $fixedQuery->getType()->getWrappedType()->getWrappedType());
+        $this->assertInstanceOf(IDType::class, $fixedQuery->getType()->getWrappedType()->getWrappedType()->getWrappedType());
+    }
+
     public function testNameFromAnnotation()
     {
         $controller = new TestController();
@@ -312,7 +329,7 @@ public function testQueryProviderWithIterableClass()
 
         $queries = $queryProvider->getQueries($controller);
 
-        $this->assertCount(6, $queries);
+        $this->assertCount(7, $queries);
         $iterableQuery = $queries[3];
 
         $this->assertInstanceOf(NonNull::class, $iterableQuery->getType());
@@ -328,7 +345,7 @@ public function testQueryProviderWithIterable()
 
         $queries = $queryProvider->getQueries(new TestController());
 
-        $this->assertCount(6, $queries);
+        $this->assertCount(7, $queries);
         $iterableQuery = $queries[4];
 
         $this->assertInstanceOf(NonNull::class, $iterableQuery->getType());
@@ -353,7 +370,7 @@ public function testQueryProviderWithUnion()
 
         $queries = $queryProvider->getQueries($controller);
 
-        $this->assertCount(6, $queries);
+        $this->assertCount(7, $queries);
         $unionQuery = $queries[5];
 
         $this->assertInstanceOf(NonNull::class, $unionQuery->getType());

tests/Fixtures/TestController.php

@@ -107,4 +107,12 @@ public function testUnion()
     {
         return new TestObject2('foo');
     }
+
+    /**
+     * @Query(outputType="[ID!]!")
+     */
+    public function testFixComplexReturnType(): array
+    {
+        return ['42'];
+    }
 }