fix phpunit to 7.0 major version

saimaz · saimaz · commit 7aa5d65ff566 · 2020-02-19T22:26:02.000+02:00
diff --git a/composer.json b/composer.json
@@ -17,7 +17,7 @@
     },
     "require-dev": {
         "elasticsearch/elasticsearch": "^7.0",
-        "phpunit/phpunit": "~7.0",
+        "phpunit/phpunit": "^7.0",
         "squizlabs/php_codesniffer": "^3.0"
     },
     "suggest": {
