Convert from Flow to Typescript (#816)

* convert to typescript
* add docs for custom node typing
* update webpack, gulpfile

package.json

@@ -15,6 +15,8 @@
     "test": "test"
   },
   "dependencies": {
+    "@types/lodash": "^4.14.85",
+    "@types/ws": "^3.2.0",
     "bignumber.js": "^4.1.0",
     "https-proxy-agent": "^1.0.0",
     "jsonschema": "^1.1.1",
@@ -27,25 +29,16 @@
     "ws": "^3.3.1"
   },
   "devDependencies": {
+    "@types/node": "^8.0.53",
     "assert-diff": "^1.0.1",
-    "babel-cli": "^6.26.0",
-    "babel-core": "^6.4.0",
-    "babel-eslint": "^6.0.4",
-    "babel-loader": "^6.2.1",
-    "babel-preset-es2015": "^6.3.13",
-    "babel-preset-flow": "^6.23.0",
-    "babel-preset-stage-1": "^6.3.13",
-    "babel-register": "^6.3.13",
     "coveralls": "^2.13.1",
     "doctoc": "^0.15.0",
     "ejs": "^2.3.4",
     "eslint": "^2.9.0",
     "eventemitter2": "^0.4.14",
-    "flow-bin": "^0.59.0",
     "gulp": "^3.8.10",
     "gulp-bump": "^0.1.13",
     "gulp-rename": "^1.2.0",
-    "gulp-uglify": "^1.1.0",
     "http-server": "^0.8.5",
     "istanbul": "^1.1.0-alpha.1",
     "jayson": "^1.2.2",
@@ -55,8 +48,12 @@
     "mocha-in-sauce": "^0.0.1",
     "mocha-junit-reporter": "^1.9.1",
     "null-loader": "^0.1.1",
-    "webpack": "^1.5.3",
-    "yargs": "^1.3.1"
+    "ts-loader": "^3.2.0",
+    "ts-node": "^3.3.0",
+    "typescript": "^2.6.1",
+    "uglifyjs-webpack-plugin": "^1.1.4",
+    "webpack": "^3.10.0",
+    "yargs": "^8.0.2"
   },
   "scripts": {
     "build": "gulp",
@@ -64,11 +61,11 @@
     "docgen": "node --harmony scripts/build_docs.js",
     "clean": "rm -rf dist/npm",
     "typecheck": "flow check",
-    "compile": "babel -D --optional runtime -d dist/npm/ src/",
-    "watch": "babel -w -D --optional runtime -d dist/npm/ src/",
+    "compile": "mkdir -p dist/npm/common && cp -r src/common/schemas dist/npm/common/ && tsc",
+    "watch": "tsc -w",
     "compile-with-source-maps": "babel -D --optional runtime -s -t -d dist/npm/ src/",
     "prepublish": "npm run clean && npm run compile",
-    "test": "babel-node ./node_modules/.bin/istanbul cover ./node_modules/mocha/bin/_mocha",
+    "test": "istanbul cover _mocha",
     "coveralls": "cat ./coverage/lcov.info | coveralls",
     "lint": "if ! [ -f .eslintrc ]; then curl -o .eslintrc 'https://raw.githubusercontent.com/ripple/javascript-style-guide/es6/eslintrc'; echo 'parser: babel-eslint' >> .eslintrc; fi; eslint -c .eslintrc src/",
     "perf": "./scripts/perf_test.sh",