chore: upgrade tslint

Author: aikoven

package.json

@@ -29,7 +29,7 @@
     "redux": "^3.6.0",
     "rimraf": "^2.5.4",
     "tape": "^4.6.2",
-    "tslint": "^4.0.2",
+    "tslint": "^4.1.0",
     "typescript": "^2.0.3"
   }
 }

tslint.json

@@ -14,14 +14,11 @@
       80
     ],
     "no-duplicate-variable": true,
-    "no-duplicate-key": true,
     "no-empty": false,
     "no-eval": true,
     "no-internal-module": true,
     "no-trailing-whitespace": false,
-    "no-unreachable": true,
     "no-unused-expression": true,
-    "no-unused-variable": true,
     "no-use-before-declare": true,
     "no-var-keyword": true,
     "one-line": [