Merge pull request #295 from yenyasinn/294-dependencies

#294: Allow latest versions of dependencies to be used.

Author: jenschude

composer.json

@@ -50,9 +50,9 @@
     "ext-json": "*",
     "guzzlehttp/psr7": "^1.7 || ^2.0.0",
     "guzzlehttp/guzzle": "^6.0 || ^7.0",
-    "psr/cache": "^1.0 || ^2.0 || 3.0",
-    "psr/simple-cache": "^1.0 || ^2.0 || 3.0",
-    "psr/log": "^1.0 || ^2.0 || 3.0",
+    "psr/cache": "^1.0 || ^2.0 || ^3.0",
+    "psr/simple-cache": "^1.0 || ^2.0 || ^3.0",
+    "psr/log": "^1.0 || ^2.0 || ^3.0",
     "psr/http-client": "^1.0",
     "psr/http-message": "^1.0 || ^2.0",
     "ramsey/uuid": "^4.0",