style: resolve lint issue

__tests__/index.spec.ts

@@ -1,11 +1,11 @@
-import { testTest } from '../src/index.js';
+import { TEST_TEST } from '../src/index.js';
 
 describe('simple rxstate', (): void => {
   describe('test constant', (): void => {
     it('should have value', (): void => {
       expect.assertions(1);
 
-      expect(testTest).toBe('hellotest');
+      expect(TEST_TEST).toBe('hellotest');
     });
   });
 });

src/constants.ts

@@ -1,3 +1,3 @@
-const test: string = 'test';
+const TEST: string = 'test';
 
-export { test };
+export { TEST };

src/index.ts

@@ -1,5 +1,5 @@
-import { test } from './constants.js';
+import { TEST } from './constants.js';
 
-const testTest: string = `hello${test}`;
+const TEST_TEST: string = `hello${TEST}`;
 
-export { testTest };
+export { TEST_TEST };