Move hash function into utils (#6503)

Author: robwalch

src/types/general.ts

@@ -0,0 +1,10 @@
+// From https://github.com/darkskyapp/string-hash
+export function hash(text: string) {
+  let hash = 5381;
+  let i = text.length;
+  while (i) {
+    hash = (hash * 33) ^ text.charCodeAt(--i);
+  }
+
+  return (hash >>> 0).toString();
+}

src/utils/hash.ts

@@ -1,5 +1,6 @@
 import { VTTParser } from './vttparser';
 import { utf8ArrayToStr } from '@svta/common-media-library/utils/utf8ArrayToStr';
+import { hash } from './hash';
 import {
   RationalTimestamp,
   toMpegTsClockFromTimescale,
@@ -45,17 +46,6 @@ const cueString2millis = function (timeString: string) {
   return ts;
 };
 
-// From https://github.com/darkskyapp/string-hash
-const hash = function (text: string) {
-  let hash = 5381;
-  let i = text.length;
-  while (i) {
-    hash = (hash * 33) ^ text.charCodeAt(--i);
-  }
-
-  return (hash >>> 0).toString();
-};
-
 // Create a unique hash id for a cue based on start/end times and text.
 // This helps timeline-controller to avoid showing repeated captions.
 export function generateCueId(