Try different monolog version

Dan Richelson · Dan Richelson · commit 6ca5d4bfe006 · 2017-01-31T11:52:27.000-08:00
diff --git a/composer.json b/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "monolog/monolog": "1.21.*",
+        "monolog/monolog": "~1.21",
         "php": ">=5.5",
         "psr/log": "1.0.*"
     },
