Update flow + "@flow strict" (#1229)

* Update Flow to 0.65.0

* Replace '@flow' with '@flow strict'

* Partial revert of #1160

* lexicographicSortSchema: Remove workarounds for non-const args

* Reduce scope of change

* Reduce scope of change

Author: IvanGoncharov

src/__tests__/starWarsData.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @flow
+ * @flow strict
  */
 
 /**

src/__tests__/starWarsIntrospection-test.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @flow
+ * @flow strict
  */
 
 import { expect } from 'chai';

src/__tests__/starWarsQuery-test.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @flow
+ * @flow strict
  */
 
 import { expect } from 'chai';

src/__tests__/starWarsSchema.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @flow
+ * @flow strict
  */
 
 import {

src/__tests__/starWarsValidation-test.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @flow
+ * @flow strict
  */
 
 import { expect } from 'chai';

src/error/GraphQLError.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @flow
+ * @flow strict
  */
 
 import { printError } from './printError';
@@ -125,8 +125,7 @@ export function GraphQLError( // eslint-disable-line no-redeclare
 
   let _locations;
   if (positions && source) {
-    const providedSource = source;
-    _locations = positions.map(pos => getLocation(providedSource, pos));
+    _locations = positions.map(pos => getLocation(source, pos));
   } else if (_nodes) {
     _locations = _nodes.reduce((list, node) => {
       if (node.loc) {

src/error/formatError.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @flow
+ * @flow strict
  */
 
 import invariant from '../jsutils/invariant';

src/error/index.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @flow
+ * @flow strict
  */
 
 export { GraphQLError } from './GraphQLError';

src/error/locatedError.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @flow
+ * @flow strict
  */
 
 import { GraphQLError } from './GraphQLError';

src/error/printError.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @flow
+ * @flow strict
  */
 
 import { getLocation } from '../language/location';