fix nsp, yarn audit, and tslint issues

package.json

@@ -46,8 +46,7 @@
     "lodash": "^4.17.11",
     "mocha": "^5.1.1",
     "mocha-junit-reporter": "^1.17.0",
-    "nsp": "^3.1.0",
-    "nyc": "^12.0.2",
+    "nyc": "^13.3.0",
     "onchange": "^4.1.0",
     "ts-node": "^7.0.0",
     "tslint": "^5.9.1",

tslint.json

@@ -10,8 +10,9 @@
     "no-var-requires": false,
     "object-literal-sort-keys": false,
     "quotemark": [true, "single", "avoid-escape"],
+    "radix": false,
     "semicolon": [true, "never"],
     "trailing-comma": [true, "never"],
     "triple-equals": [true, "allow-undefined-check"]
   }
-}
+}
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