Encode multibyte Unicode characters literally

#81

1.3.0

Added:

• Support for additional security access token #67

Fixed:

• Typos in Expo class #57

Changed:

• Expo::notify() only accepts parameter $interests as an array. #54

1.2.0

Added

• Set custom storage file path. #33

Changed

• Throwing an exception when response is an empty array. #36 #38

v1.1.2

• Fixed bug with ExpoFileDriver that prevent removing of first subscriber.
• Throw exception if the token.json file does not exist.

v1.1.1

Merge pull request #17 from patrickkivits/feature-multiple-tokens-per…

v1.1

Add the ability to add more than one token for a subscriber.

Initial release

v1.0

Update README