Fix bug in cheap diff, add tests.

Author: Lattyware

.gitattributes

@@ -0,0 +1,2 @@
+package-lock.json binary
+

elm.json

@@ -3,14 +3,14 @@
     "name": "lattyware/elm-json-diff",
     "summary": "Compute JSON patches by comparing two JSON values.",
     "license": "BSD-3-Clause",
-    "version": "1.0.0",
+    "version": "1.0.1",
     "exposed-modules": [
         "Json.Diff",
         "Json.Patch.Invertible"
     ],
     "elm-version": "0.19.0 <= v <= 0.20.0",
     "dependencies": {
-        "elm/core": "1.0.4 <= v < 2.0.0",
+        "elm/core": "1.0.5 <= v < 2.0.0",
         "elm/json": "1.1.3 <= v < 2.0.0",
         "norpan/elm-json-patch": "1.0.1 <= v < 2.0.0"
     },