Try some manual updates.

.gitignore

@@ -42,3 +42,5 @@ testem.log
 .DS_Store
 Thumbs.db
 *~
+
+.angular/

angular.json

@@ -127,5 +127,8 @@
       }
     }
   },
-  "defaultProject": "converter"
+  "defaultProject": "converter",
+  "cli": {
+    "analytics": false
+  }
 }

package.json

@@ -32,40 +32,40 @@
   },
   "private": true,
   "dependencies": {
-    "@angular/common": "6.1.7",
-    "@angular/compiler": "6.1.7",
-    "@angular/core": "6.1.7",
-    "@angular/forms": "6.1.7",
-    "@angular/platform-browser": "6.1.7",
-    "@angular/platform-browser-dynamic": "6.1.7",
-    "@angular/router": "6.1.7",
-    "core-js": "^2.5.1",
-    "punycode": "^2.1.0",
-    "quoted-printable": "^1.0.0",
-    "rxjs": "^6.3.2",
-    "utf8": "^2.1.0",
-    "zone.js": "^0.8.26"
+    "@angular/common": "^16",
+    "@angular/compiler": "^16",
+    "@angular/core": "^16",
+    "@angular/forms": "^16.2.12",
+    "@angular/platform-browser": "^16",
+    "@angular/platform-browser-dynamic": "^16.2.12",
+    "@angular/router": "^16.2.12",
+    "core-js": "^3.35.1",
+    "punycode": "^2.3.1",
+    "quoted-printable": "^1.0.1",
+    "rxjs": "^7",
+    "utf8": "^3.0.0",
+    "zone.js": "^0.13.3"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "~0.7.0",
-    "@angular/cli": "6.1.5",
-    "@angular/compiler-cli": "6.1.7",
-    "@types/jasmine": "~2.8.6",
-    "@types/jasminewd2": "~2.0.3",
-    "@types/node": "~8.9.4",
-    "codelyzer": "~4.2.1",
-    "jasmine-core": "~2.99.1",
-    "jasmine-spec-reporter": "~4.2.1",
-    "karma": "~1.7.1",
-    "karma-chrome-launcher": "~2.2.0",
-    "karma-coverage-istanbul-reporter": "~2.0.0",
-    "karma-jasmine": "~1.1.1",
-    "karma-jasmine-html-reporter": "^0.2.2",
-    "karma-nightmare": "~0.4.15",
-    "protractor": "~5.4.0",
-    "puppeteer": "~1.7.0",
-    "ts-node": "~5.0.1",
-    "tslint": "~5.9.1",
-    "typescript": "2.9.2"
+    "@angular-devkit/build-angular": "^16.2.11",
+    "@angular/cli": "^16.2.11",
+    "@angular/compiler-cli": "^16.2.12",
+    "@types/jasmine": "^5.1.4",
+    "@types/jasminewd2": "^2.0.13",
+    "@types/node": "^20.11.5",
+    "codelyzer": "^6.0.2",
+    "jasmine-core": "^5.1.1",
+    "jasmine-spec-reporter": "^7.0.0",
+    "karma": "^6.4.2",
+    "karma-chrome-launcher": "^3.2.0",
+    "karma-coverage-istanbul-reporter": "^3.0.3",
+    "karma-jasmine": "^5.1.0",
+    "karma-jasmine-html-reporter": "^2.1.0",
+    "karma-nightmare": "^0.4.15",
+    "protractor": "^7.0.0",
+    "puppeteer": "^21.7.0",
+    "ts-node": "^10.9.2",
+    "tslint": "^6.1.3",
+    "typescript": "^5.1.6"
   }
 }