feat: expose version from player.version() (#8543)

Add a `Player#version()` method which returns an object with the Video.js version under the `video.js` property name, to match the package name.

This could then be extended to support adding plugin, tech, and source handler versions as part of the version call.

Fixes #8538

src/js/player.js

@@ -1328,6 +1328,26 @@ class Player extends Component {
     return this.tech_;
   }
 
+  /**
+   * An object that contains Video.js version.
+   *
+   * @typedef {Object} PlayerVersion
+   *
+   * @property {string} 'video.js' - Video.js version
+   */
+
+  /**
+   * Returns an object with Video.js version.
+   *
+   * @return {PlayerVersion}
+   *          An object with Video.js version.
+   */
+  version() {
+    return {
+      'video.js': version
+    };
+  }
+
   /**
    * Set up click and touch listeners for the playback element
    *

test/unit/player.test.js

@@ -1901,6 +1901,12 @@ QUnit.test('Player#tech logs a warning when called without a safety argument', f
   log.warn = oldLogWarn;
 });
 
+QUnit.test('player#version will return an object with video.js version', function(assert) {
+  const player = TestHelpers.makePlayer();
+
+  assert.strictEqual(player.version()['video.js'], pkg.version, 'version is correct');
+});
+
 QUnit.test('player#reset loads the Html5 tech and then techCalls reset', function(assert) {
   let loadedTech;
   let loadedSource;