Update ESLint configuration, package.json, and README; improve formatting and versioning consistency. Adjust TypeScript configuration to disallow importing extensions and refine test scripts for better readability.

tests/HashMap.test.ts

@@ -253,7 +253,7 @@ describe("HashMap", () => {
       const numMap = new HashMap<number, string>(
         16,
         0.75,
-        new NumericHashFunction()
+        new NumericHashFunction(),
       );
 
       numMap.set(123, "value1");
@@ -273,7 +273,7 @@ describe("HashMap", () => {
       const customMap = new HashMap<string, string>(
         8,
         0.75,
-        new SimpleHashFunction()
+        new SimpleHashFunction(),
       );
 
       customMap.set("hi", "short");
@@ -359,4 +359,3 @@ describe("HashMap", () => {
     });
   });
 });
-