ci: add typecheck script

Author: felixfbecker

.travis.yml

@@ -10,6 +10,7 @@ jobs:
       script:
         - npm run prettier-check
         - npm run tslint
+        - npm run typecheck
         - npm run build
         - npm run cover
         - nyc report --reporter json

package.json

@@ -66,6 +66,7 @@
     "prettier-check": "npm run prettier -- --write=false",
     "prettier": "prettier '**/*.{js?(on),ts?(x),scss,yml,md}' --write --list-different",
     "tslint": "tslint -c tslint.json -p tsconfig.json './src/*.ts?(x)' './*.ts?(x)'",
+    "typecheck": "tsc -p .",
     "test": "TS_NODE_COMPILER_OPTIONS='{\"module\":\"commonjs\"}' mocha --require ts-node/register --require source-map-support/register --opts mocha.opts",
     "cover": "TS_NODE_COMPILER_OPTIONS='{\"module\":\"commonjs\"}' nyc --require ts-node/register --require source-map-support/register --all mocha --opts mocha.opts --timeout 10000",
     "build": "parcel build --no-minify --out-file sourcegraph-git-extras.js src/extension.ts",

tsconfig.json

@@ -9,6 +9,7 @@
     "inlineSourceMap": true,
     "declaration": false,
     "outDir": "dist",
+    "noEmit": true,
     "rootDir": "src",
     "esModuleInterop": true,
     "allowSyntheticDefaultImports": true