Tests: Add custom build of core to tests

This adds a custom build which excludes the event/alias and deprecated modules

Fixes #12770
Closes gh-1556

external/jquery-custom/MIT-LICENSE.txt

@@ -0,0 +1,21 @@
+Copyright 2014 jQuery Foundation and other contributors
+http://jquery.com/
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

tests/lib/qunit.js

@@ -27,7 +27,7 @@ QUnit.config.urlConfig.push({
 		"1.11.0", "1.11.1", "1.11.2", "1.11.3",
 		"2.0.0", "2.0.1", "2.0.2", "2.0.3",
 		"2.1.0", "2.1.1", "2.1.2", "2.1.3",
-		"compat-git", "git"
+		"compat-git", "git", "custom"
 	],
 	tooltip: "Which jQuery Core version to test against"
 });