use CACHE_ALL_POLICIES in .env (#4)

use CACHE_ALL_POLICIES in .env file to enable / disable global policy caching

Author: ruaq

README.md

@@ -31,10 +31,15 @@ return [
     /*
      * When enabled, the package will cache the results of all Policies in your Laravel application
      */
-    'cache_all_policies' => true,
+    'cache_all_policies' => env('CACHE_ALL_POLICIES', true),
 ];
 ```
 
+You can also use `CACHE_ALL_POLICIES` in your `.env` file to change it.
+```.dotenv
+CACHE_ALL_POLICIES=false
+```
+
 ## Usage
 
 By default, this package caches all policy calls of your entire application. You can disable this behavior by setting the ```cache_all_policies```configuration to false. Now you can specify which Policy classes should be soft cached and which not. If you want your policy to be cached, add the ```Innoge\LaravelPolicySoftCache\Contracts\SoftCacheable``` interface.

config/policy-soft-cache.php

@@ -4,5 +4,5 @@
     /*
      * When enabled, the package will cache the results of all Policies in your Laravel application
      */
-    'cache_all_policies' => true,
+    'cache_all_policies' => env('CACHE_ALL_POLICIES', true),
 ];