style: replace var with const

packages/loot-core/src/server/timestamp.test.js

@@ -46,13 +46,13 @@ describe('Timestamp', function() {
     });
 
     it('should parse', function() {
-      var validInputs = [
+      const validInputs = [
         '1970-01-01T00:00:00.000Z-0000-0000000000000000',
         '2015-04-24T22:23:42.123Z-1000-0123456789ABCDEF',
         '9999-12-31T23:59:59.999Z-FFFF-FFFFFFFFFFFFFFFF'
       ];
       for (const validInput of validInputs) {
-        var parsed = Timestamp.parse(validInput);
+        const parsed = Timestamp.parse(validInput);
         expect(typeof parsed).toBe('object');
         expect(parsed.millis() >= 0).toBeTruthy();
         expect(parsed.millis() < 253402300800000).toBeTruthy();