add isSafari util

packages/artplayer/src/utils/compatibility.js

@@ -0,0 +1,9 @@
+export const userAgent = window.navigator.userAgent;
+
+export function isMobile() {
+    return /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(userAgent);
+}
+
+export function isSafari() {
+    return /^((?!chrome|android).)*safari/i.test(userAgent);
+}

packages/artplayer/src/utils/index.js

@@ -5,3 +5,4 @@ export * from './file';
 export * from './property';
 export * from './time';
 export * from './format';
+export * from './compatibility';