Move easings into global file

src/animations/easings.ts

@@ -0,0 +1,15 @@
+/**
+ * Ease: Quart Out Array
+ */
+export const quartOut = [.165, .84, .44, 1]
+
+
+/**
+ * Ease: Quart In Out function
+ */
+export const quartInOutFunc = (t: number, b: number, c: number, d: number) => {
+	t /= d/2
+	if (t < 1) return c/2 * t * t * t * t + b
+	t -= 2
+	return -c / 2 * (t * t * t * t - 2) + b
+}