adds $pkg alias

src/lib/utility/package/type-guards.ts

@@ -0,0 +1,7 @@
+export function isBoolean(value: any): value is boolean {
+	return typeof value === 'boolean';
+}
+
+export function isNumber(value: any): value is number {
+	return typeof value === 'number' && !isNaN(value);
+}