Merge branch '2.0'

* 2.0:
  Generate changelog for v2.0.10
  Fix referencing context initializers
  Add conflict with symfony/stopwatch ^5.0
  Fix the build & add tests for Symfony 4.3 and 4.4

composer.json

@@ -27,8 +27,12 @@
         "sylius-labs/coding-standard": "^3.0",
         "symfony/browser-kit": "^3.4|^4.2",
         "symfony/framework-bundle": "^3.4|^4.2",
+        "symfony/process": "^3.4|^4.2",
         "symfony/yaml": "^3.4|^4.2"
     },
+    "conflict": {
+        "symfony/stopwatch": "^5.0"
+    },
     "suggest": {
         "behat/mink-browserkit-driver": "^1.3"
     },