Update dependency nyc to v13.1.0

package.json

@@ -98,7 +98,7 @@
     "mocha-webpack": "2.0.0-beta.0",
     "mousetrap": "1.6.2",
     "npm-run-all": "4.1.3",
-    "nyc": "13.0.1",
+    "nyc": "13.1.0",
     "sinon": "7.0.0",
     "socket.io-client": "2.1.1",
     "stylelint": "9.6.0",

test/.nycrc-mocha

@@ -1,6 +1,6 @@
 {
   "all": true,
-  "temp-directory": "./node_modules/.cache/nyc_output",
+  "temp-dir": "./node_modules/.cache/nyc_output",
   "exclude": [
     "webpack.config*.js"
   ],

test/.nycrc-mocha-webpack

@@ -1,6 +1,6 @@
 {
   "all": true,
-  "temp-directory": "./node_modules/.cache/nyc_output",
+  "temp-dir": "./node_modules/.cache/nyc_output",
   "include": [
     "client/"
   ],

test/.nycrc-report

@@ -1,5 +1,5 @@
 {
-  "temp-directory": "./node_modules/.cache/nyc_output",
+  "temp-dir": "./node_modules/.cache/nyc_output",
   "reporter": [
     "lcov",
     "text-summary"