Update README.md

Author: nilmerg

README.md

@@ -16,15 +16,15 @@ path for Icinga Web 2 installations is: `/usr/share/icinga-php`
 Download or clone this repository there (e.g. `/usr/share/icinga-php/vendor`) and you're done.
 
 > **Note**: Do NOT install the GIT master, it will not work! Checking out a
-> branch like `stable/0.11.0` or a tag like `v0.11.0` is fine.
+> branch like `stable/0.13.0` or a tag like `v0.13.0` is fine.
 
 ### Examples
 
 **Sample Tarball installation**
 
 ```sh
 INSTALL_PATH="/usr/share/icinga-php/vendor"
-INSTALL_VERSION="v0.11.0"
+INSTALL_VERSION="v0.13.0"
 mkdir "$INSTALL_PATH" \
 && wget -q "https://github.com/Icinga/icinga-php-thirdparty/archive/$INSTALL_VERSION.tar.gz" -O - \
    | tar xfz - -C "$INSTALL_PATH" --strip-components 1
@@ -34,6 +34,6 @@ mkdir "$INSTALL_PATH" \
 
 ```
 INSTALL_PATH="/usr/share/icinga-php/vendor"
-INSTALL_VERSION="stable/0.11.0"
+INSTALL_VERSION="stable/0.13.0"
 git clone https://github.com/Icinga/icinga-php-thirdparty.git "$INSTALL_PATH" --branch "$INSTALL_VERSION"
 ```