Release 0.14.0 (#117)

* Update Cargo.toml

* Update README.md

Author: alfg

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "mp4"
-version = "0.13.0"
+version = "0.14.0"
 authors = ["Alf <[email protected]>"]
 edition = "2018"
 description = "MP4 reader and writer library in Rust."

README.md

@@ -63,7 +63,7 @@ cargo add mp4
 ```
 or add to your `Cargo.toml`:
 ```toml
-mp4 = "0.13.0"
+mp4 = "0.14.0"
 ```
 
 #### Documentation