Temporarily test against Level/abstract-leveldown#352 and Level/levelup#680

Author: vweevers

package.json

@@ -16,11 +16,11 @@
     "test": "test"
   },
   "dependencies": {
-    "abstract-leveldown": "^6.1.1",
+    "abstract-leveldown": "github:Level/abstract-leveldown#fix-manifest-test",
     "encoding-down": "^6.2.0",
     "inherits": "^2.0.3",
     "level-option-wrap": "^1.1.0",
-    "levelup": "^4.2.0",
+    "levelup": "github:Level/levelup#fix-floating-promise",
     "reachdown": "^1.0.0"
   },
   "devDependencies": {