Backport changes from Cloudproxy (#11)

tsconfig.json

@@ -0,0 +1,21 @@
+{
+  "compilerOptions": {
+    "moduleResolution": "node",
+    "target": "es2017",
+    "noImplicitAny": true,
+    "removeComments": true,
+    "preserveConstEnums": true,
+    "allowSyntheticDefaultImports": true,
+    "resolveJsonModule": true,
+    "lib": [
+      "es2015", "dom"
+    ],
+    "module": "commonjs",
+    "outDir": "dist",
+    "sourceMap": true
+  },
+  "include": [
+    "src", "node_modules/@types/puppeteer/index.d.ts"
+  ],
+  "exclude": ["node_modules"]
+}