Add scss decralarations

declarations.d.ts

@@ -0,0 +1,4 @@
+declare module "*.module.scss" {
+  const classes: { [key: string]: string };
+  export default classes;
+}

tsconfig.json

@@ -15,6 +15,12 @@
     "jsx": "preserve",
     "incremental": true
   },
-  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
+  "include": [
+    "next-env.d.ts",
+    "**/*.ts",
+    "**/*.tsx",
+    ".next/types/**/*.ts",
+    "declarations.d.ts"
+  ],
   "exclude": ["node_modules"]
 }