Update Node.js to v10.20.1

.nvmrc

@@ -1 +1 @@
-10.16.2
+10.20.1

package-lock.json

@@ -1338,9 +1338,9 @@
       "dev": true
     },
     "@types/node": {
-      "version": "10.14.15",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-10.14.15.tgz",
-      "integrity": "sha512-CBR5avlLcu0YCILJiDIXeU2pTw7UK/NIxfC63m7d7CVamho1qDEzXKkOtEauQRPMy6MI8mLozth+JJkas7HY6g==",
+      "version": "10.17.21",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-10.17.21.tgz",
+      "integrity": "sha512-PQKsydPxYxF1DsAFWmunaxd3sOi3iMt6Zmx/tgaagHYmwJ/9cRH91hQkeJZaUGWbvn0K5HlSVEXkn5U/llWPpQ==",
       "dev": true
     },
     "@types/normalize-package-data": {

package.json

@@ -16,7 +16,7 @@
     }
   },
   "devDependencies": {
-    "@types/node": "10.14.15",
+    "@types/node": "10.17.21",
     "@types/pretty-bytes": "5.1.0",
     "@types/webassembly-js-api": "0.0.3",
     "@webcomponents/custom-elements": "1.2.4",