Add Github workflow badge

Author: jakubboucek

.github/workflows/code_analysis.yaml

@@ -44,7 +44,9 @@ jobs:
           echo "::set-output name=dir::$(composer config cache-files-dir)"
       - uses: actions/cache@v2
         with:
-          path: ${{ steps.composer-cache.outputs.dir }}
+          path: |
+            ${{ steps.composer-cache.outputs.dir }}
+            **/composer.lock
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
           restore-keys: |
             ${{ runner.os }}-composer-

README.md

@@ -3,6 +3,8 @@ Checks if the `vendor/` directory is consistent with project's `composer.lock` (
 
 `composer.json` <== (synchronized) ==> `/vendor`
 
+![Code Analysis](https://github.com/jakubboucek/php-composer-consistency/workflows/Code%20Analysis/badge.svg)
+
 ## About
 For small teams can be difficult to cooperate and keep `/vendor` directory synchronized with requirements
 in `composer.json`. Your colleagues can be a junior or can be not accustomed to right use the Composer and often forgot