Core: Arrays like [42] should fail .isNumeric()

Fixes #14179
(cherry picked from commit 10efa1f5b4)

src/core.js

@@ -216,7 +216,7 @@ jQuery.extend({
 		// parseFloat NaNs numeric-cast false positives (null|true|false|"")
 		// ...but misinterprets leading-number strings, particularly hex literals ("0x...")
 		// subtraction forces infinities to NaN
-		return obj - parseFloat( obj ) >= 0;
+		return !jQuery.isArray( obj ) && obj - parseFloat( obj ) >= 0;
 	},
 
 	isEmptyObject: function( obj ) {