chore: fix vscode linting + typechecking config

rollup.config.ts

@@ -48,7 +48,10 @@ export default defineConfig({
           }),
         ]
       : []),
-    typescript({ useTsconfigDeclarationDir: true }),
+    typescript({
+      tsconfig: 'tsconfig.build.json',
+      useTsconfigDeclarationDir: true,
+    }),
     ...(prod
       ? [
           terser({

tsconfig.build.json

@@ -0,0 +1,7 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "baseUrl": "src"
+  },
+  "include": ["src/**/*.ts"]
+}

tsconfig.json

@@ -1,23 +1,22 @@
 {
   "compilerOptions": {
-    "baseUrl": "src",
+    "baseUrl": ".",
     "target": "es2017",
     "module": "es2015",
+    "moduleResolution": "node",
     "lib": ["esnext", "dom"],
     "strict": true,
     "strictNullChecks": false,
     "outDir": ".",
     "experimentalDecorators": true,
     "esModuleInterop": true,
     "allowSyntheticDefaultImports": true,
+    "allowJs": true,
+    "checkJs": true,
     "declaration": true,
     "declarationDir": ".",
     "sourceMap": true
   },
-  "include": [
-    "src/**/*.ts"
-  ],
-  "exclude": [
-    "node_modules"
-  ]
+  "include": ["src/**/*.ts", "test/**/*.ts", "rollup.config.ts"],
+  "exclude": ["node_modules"]
 }