Add compat with xp-forge/rest-client 0.8

Author: thekid

composer.json

@@ -7,7 +7,7 @@
   "keywords": ["module", "xp"],
   "require" : {
     "xp-framework/core": "^9.0 | ^8.0 | ^7.0 | ^6.5",
-    "xp-forge/rest-client": "^0.7 | ^0.6 | ^0.5 | ^0.4",
+    "xp-forge/rest-client": "^0.8 | ^0.7 | ^0.6 | ^0.5 | ^0.4",
     "xp-forge/keepass": "^0.6 | ^0.5",
     "php" : ">=5.6.0"
   },