Add typechecking to linting (#8)

Author: imnasnainaec

package.json

@@ -21,9 +21,10 @@
     "start:core": "cd ../paranext-core && npm run start",
     "start": "cross-env MAIN_ARGS=\"--extensions $INIT_CWD/dist\" concurrently \"npm:watch\" \"npm:start:core\"",
     "start:production": "cross-env MAIN_ARGS=\"--extensions $INIT_CWD/dist\" concurrently \"npm:watch:production\" \"npm:start:core\"",
-    "lint": "npm run lint:scripts && npm run lint:styles",
+    "lint": "npm run lint:scripts && npm run lint:styles && npm run lint:typecheck",
     "lint:scripts": "cross-env NODE_ENV=development eslint --ext .cjs,.js,.jsx,.ts,.tsx --cache .",
     "lint:styles": "stylelint **/*.{css,scss} --allow-empty-input",
+    "lint:typecheck": "tsc --noEmit",
     "lint-fix": "npm run lint-fix:scripts && npm run lint:styles -- --fix",
     "lint-fix:scripts": "npm run format && npm run lint:scripts",
     "bump-versions": "ts-node ./lib/bump-versions.ts",

tsconfig.json

@@ -1,5 +1,6 @@
 {
   "compilerOptions": {
+    "skipLibCheck": true,
     "target": "ESNext",
     "useDefineForClassFields": true,
     "lib": ["DOM", "DOM.Iterable", "ESNext"],