refactored and fixed build error

Author: AvrAlexandra

package-lock.json

@@ -45,7 +45,6 @@
     "commander": "^11.1.0",
     "cross-env": "^7.0.3",
     "csv": "^6.0.4",
-    "date-fns": "^4.1.0",
     "dotenv": "^16.0.3",
     "isomorphic-git": "^1.27.1",
     "lodash": "^4.17.21",
@@ -96,7 +95,7 @@
     "sort-package-json": "^1.52.0",
     "ts-jest": "^27.0.5",
     "ts-node": "^10.2.1",
-    "typescript": "^4.9.5"
+    "typescript": "^4.4.3"
   },
   "publishConfig": {
     "registry": "https://npm.pkg.github.com"

package.json

@@ -1,6 +1,26 @@
 import {LibraryInfo} from "../../extension-points/registrar"
 import semver from 'semver'
-import { differenceInBusinessDays, parseISO } from "date-fns"
+import moment from 'moment'
+
+function differenceInBusinessDays(laterDate: Date, earlierDate: Date): number {
+  const start = moment(earlierDate);
+  const end = moment(laterDate);
+  let businessDays = 0;
+
+  while (start.isBefore(end)) {
+    const dayOfWeek = start.day();
+    if (dayOfWeek !== 0 && dayOfWeek !== 6) {
+      businessDays++;
+    }
+    start.add(1, 'day');
+  }
+
+  return businessDays;
+}
+
+function parseISO(dateString: string): Date {
+  return new Date(dateString);
+}
 
 export function GrowthPatternMetric(data: CommitDependencyHistory): any {
   const summary: Record<string, any> = {};