Tests: Take development jQuery versions from releases.jquery.com

code.jquery.com is now used just for the specific versions.

Author: mgol

tests/lib/bootstrap.js

@@ -108,7 +108,7 @@ function jqueryUrl() {
 	var url;
 
 	if ( version === "git" || version === "3.x-git" ) {
-		url = "https://code.jquery.com/jquery-" + version;
+		url = "https://releases.jquery.com/git/jquery-" + version;
 	} else {
 		url = "../../../external/jquery-" + version + "/jquery";
 	}
@@ -121,7 +121,7 @@ function migrateUrl() {
 	var url;
 
 	if ( jqueryVersion === "git" ) {
-		url = "https://code.jquery.com/jquery-migrate-git";
+		url = "https://releases.jquery.com/git/jquery-migrate-git";
 	} else if ( jqueryVersion[ 0 ] === "3" ) {
 		url = "../../../external/jquery-migrate-3.3.2/jquery-migrate";
 	} else if ( jqueryVersion[ 0 ] === "1" || jqueryVersion[ 0 ] === "2" ) {