Make use of eslint hierarchies

Author: Zalastax

.eslintrc

@@ -2,16 +2,13 @@
   "env": {
     "node": true,
     "browser": true,
-    "mocha": true,
     "amd": true,
     "es6": true
   },
   "globals": {
-    "p5": true,
-    "assert": true,
-    "expect": true,
-    "sinon": true
+    "p5": true
   },
+  "root": true,
   "extends": ["eslint:recommended", "prettier"],
   "plugins": ["prettier"],
   "parserOptions": {

test/.eslintrc

@@ -0,0 +1,12 @@
+{
+  "env": {
+    "mocha": true
+  },
+  "globals": {
+    "assert": false,
+    "sinon": false,
+    "expect": false,
+    "promisedSketch": true,
+    "testSketchWithPromise": true
+  }
+}