Added mocha-no-only ESlint plugin. (#1529)

.eslintrc

 {
   "extends" : [
     "standard",
-    "plugin:promise/recommended"
+    "plugin:promise/recommended",
   ],
   "plugins": [
-    "promise"
+    "mocha-no-only",
+    "promise",
   ],
   "env": {
     "browser" : true,
     "node"    : true,
     "mocha"   : true,
-    "jest"    : true
+    "jest"    : true,
   },
   "globals" : {
     "artifacts": false,
     "contract": false,
     "assert": false,
-    "web3": false
+    "web3": false,
   },
   "rules": {
 
@@ -49,6 +50,8 @@
     "semi": ["error", "always"],
     "space-before-function-paren": ["error", "always"],
 
+    "mocha-no-only/mocha-no-only": ["error"],
+
     "promise/always-return": "off",
     "promise/avoid-new": "off",
   }

package-lock.json

@@ -3236,6 +3236,15 @@
         }
       }
     },
+    "eslint-plugin-mocha-no-only": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-mocha-no-only/-/eslint-plugin-mocha-no-only-1.0.0.tgz",
+      "integrity": "sha512-mCl1QMqzCvZL6JpOYD2eaCiOjuPBJppKUEs7w1JKMfG6cHpzsK/TzNQJmVUR29AK+cYIWDDOJHC78QlHkRMtOQ==",
+      "dev": true,
+      "requires": {
+        "requireindex": "~1.1.0"
+      }
+    },
     "eslint-plugin-node": {
       "version": "5.2.1",
       "resolved": "https://registry.npmjs.org/eslint-plugin-node/-/eslint-plugin-node-5.2.1.tgz",
@@ -8520,6 +8529,12 @@
         "resolve-from": "^1.0.0"
       }
     },
+    "requireindex": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/requireindex/-/requireindex-1.1.0.tgz",
+      "integrity": "sha1-5UBLgVV+91225JxacgBIk/4D4WI=",
+      "dev": true
+    },
     "resolve": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.4.0.tgz",

package.json

@@ -45,6 +45,7 @@
     "eslint": "^4.19.1",
     "eslint-config-standard": "^10.2.1",
     "eslint-plugin-import": "^2.13.0",
+    "eslint-plugin-mocha-no-only": "^1.0.0",
     "eslint-plugin-node": "^5.2.1",
     "eslint-plugin-promise": "^3.8.0",
     "eslint-plugin-standard": "^3.1.0",