All: Migrate away from deprecated/removed Core APIs

Summary of the changes:

* Build: Add jQuery 3.2.0-3.4.1 to versions UI can be tested against
* Build: Load jQuery & Migrate via HTTPS
* Build: Add package-lock.json to .gitignore
* Build: Update jQuery Migrate from 3.0.0 to 3.1.0
* Build: Allow to run tests against jQuery 3.x-git
* Build: Fix formatting according to JSCS rules
* Build: Disable JSCS for the inlined jQuery Color
* All: Switch from $.isArray to Array.isArray (jQuery.isArray will be
  removed in jQuery 4.0)
* All: Switch from `$.isFunction( x )` to `typeof x === "function"`
  (jQuery.isFunction will be removed in jQuery 4.0)
* All: Inline jQuery.isWindow as it'll be removed in jQuery 4.0
* Effects: Fix a timing issue in a variable declaration. Previously,
  a jQuery object was created, chained & assigned to a variable that
  was then accessed in a callback used inside of this chained
  definition. Due to a timing difference in when the callback fired for
  the first time in latest jQuery master, it was being called before
  the variable was defined.
* Tests: Make dialog & draggable unit tests less strict (newest jQuery
  returns fractional results in some cases, making comparisons fail when
  there's a tiny difference)
* All: Migrate from $.trim to bare String.prototype.trim (jQuery.trim
  will be deprecated in jQuery 3.5)

Closes gh-1901

1 files changed, 4 insertions, 4 deletions

diff --git a/tests/unit/selectmenu/methods.js b/tests/unit/selectmenu/methods.js
index c25d01af5..2722fed01 100644
--- a/tests/unit/selectmenu/methods.js
+++ b/tests/unit/selectmenu/methods.js
@@ -83,21 +83,21 @@ QUnit.test( "refresh - change selected option", function( assert ) {
 	var element = $( "#speed" ).selectmenu(),
 		button = element.selectmenu( "widget" );
 
-	assert.equal( $.trim( button.text() ), "Medium", "button text after init" );
+	assert.equal( String.prototype.trim.call( button.text() ), "Medium", "button text after init" );
 
 	button.simulate( "focus" );
 
 	setTimeout( function() {
-		assert.equal( $.trim( button.text() ), "Medium", "button text after focus" );
+		assert.equal( String.prototype.trim.call( button.text() ), "Medium", "button text after focus" );
 
 		element[ 0 ].selectedIndex = 0;
 		element.selectmenu( "refresh" );
-		assert.equal( $.trim( button.text() ), "Slower", "button text after changing selected option" );
+		assert.equal( String.prototype.trim.call( button.text() ), "Slower", "button text after changing selected option" );
 
 		element.find( "option" ).prop( "selected", false );
 		element.append( "<option selected value=\"selected_option\">Selected option</option>" );
 		element.selectmenu( "refresh" );
-		assert.equal( $.trim( button.text() ), "Selected option", "button text after adding selected option" );
+		assert.equal( String.prototype.trim.call( button.text() ), "Selected option", "button text after adding selected option" );
 
 		ready();
 	} );