Integrate auto-fixing of ESLint errors to before-commit hook

package.json

@@ -31,7 +31,8 @@
   },
   "lint-staged": {
     "src/**/*.ts": [
-      "prettier --write --"
+      "prettier --write --",
+      "eslint --fix"
     ]
   },
   "husky": {

src/stats/tss.ts

@@ -16,7 +16,7 @@ const rangeTss = (duration: number, from: number, to: number): number => {
   let score = 0;
   const step = 1;
   for (let i = 0; i < duration; i += step) {
-    let intensity = from + (to - from) * (i / duration);
+    const intensity = from + (to - from) * (i / duration);
     score += steadyTss(step, intensity);
   }
   return score;