Update fxp plugin version

.travis.yml

@@ -17,7 +17,7 @@ cache:
 
 install:
   - travis_retry composer self-update && composer --version
-  - travis_retry composer global require "fxp/composer-asset-plugin:~1.1.1"
+  - travis_retry composer global require "fxp/composer-asset-plugin:~1.3.1"
   - travis_retry composer update --dev --prefer-dist --no-interaction
 # setup application:
   - |

README.md

@@ -46,7 +46,7 @@ at [getcomposer.org](http://getcomposer.org/doc/00-intro.md#installation-nix).
 You can then install this project template using the following command:
 
 ~~~
-php composer.phar global require "fxp/composer-asset-plugin:^1.2.0"
+php composer.phar global require "fxp/composer-asset-plugin:^1.3.1"
 php composer.phar create-project --prefer-dist --stability=dev yiisoft/yii2-app-basic basic
 ~~~