Merge pull request #176 from wp-cli/fix/framework-version-constraint

Author: schlessera

composer.json

@@ -14,7 +14,7 @@
     "require": {
         "ext-json": "*",
         "composer/composer": "^1.10.23 || ~2.2.17",
-        "wp-cli/wp-cli": "2.8"
+        "wp-cli/wp-cli": "^2.8"
     },
     "require-dev": {
         "wp-cli/scaffold-command": "^1 || ^2",