*much* stricter typescript (and some js) linting 😬

tsconfig.json

@@ -1,18 +1,24 @@
 {
   "compilerOptions": {
-    "target": "es2018",
+    "target": "esnext",
     "lib": [
       "esnext",
-      "es2018",
-      "dom"
+      "es2020"
     ],
-    "module": "commonjs",
+    "module": "es2020",
     "moduleResolution": "node",
+    "importHelpers": true,
     "esModuleInterop": true,
     "isolatedModules": true,
+    "alwaysStrict": true,
     "strict": true,
+    "strictNullChecks": true,
+    "strictFunctionTypes": true,
+    "strictBindCallApply": true,
+    "strictPropertyInitialization": true,
     "noEmit": true,
     "noImplicitReturns": true,
+    "noImplicitThis": true,
     "allowJs": true,
     "typeRoots": [
       "./types",
@@ -22,10 +28,10 @@
     "sourceRoot": "/",
     "inlineSources": true
   },
-  "exclude": [
-    "node_modules"
-  ],
   "include": [
     "**/*.ts"
+  ],
+  "exclude": [
+    "node_modules"
   ]
 }