MAPG-199 save static code analysis results as artifact

.gitignore

@@ -1,4 +1,3 @@
 .env
 installed
-unit_test_results.xml
 vendor

bitbucket-pipelines.yml

@@ -17,8 +17,10 @@ pipelines:
               name: Static Code Analysis
               caches:
                   - composer
+              artifacts:
+                  - static_code_analysis_results.json
               script:
                   - apt-get update && apt-get install -y unzip
                   - curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
                   - composer install
-                  - vendor/bin/phpstan analyse -c phpstan.neon
+                  - vendor/bin/phpstan analyse -c phpstan.neon --error-format=prettyJson > static_code_analysis_results.json