1.3.0: added some new features and fixes

• added addAntiCacheParam parameter to getUrl to add a random string to generated urls to prevent browser memory-caching
• added nullIfKeyNotExist parameter to getUrl
• added defaultReturn parameter to getDataUri
• fixed convertValue in case of null/undefined returns

1.2.0

• added requestPersistentStorage and getStorageSpaceInfo

1.1.0

[1.1.0] 2022-07-31

• added warning when image file url support isn't available because of missing service worker
• added getDataUri function
• fixed safari support for blob file storage by using ArrayBuffer instead

1.0.2

Initial release