Revert ol to 6.1.1

package.json

@@ -36,7 +36,9 @@
     "rxjs": "^6.5.4",
     "tassign": "^1.0.0",
     "tslib": "^1.10.0",
-    "zone.js": "~0.10.2"
+    "zone.js": "~0.10.2",
+    "minimist": "^1.2.3",
+    "ol": "6.1.1"
   },
   "devDependencies": {
     "@angular-devkit/build-angular": "~0.901.0",
@@ -50,14 +52,14 @@
     "codelyzer": "^5.1.2",
     "jasmine-core": "~2.99.1",
     "jasmine-spec-reporter": "~4.2.1",
-    "karma": "~4.0.0",
+    "karma": "^4.4.1",
     "karma-chrome-launcher": "~2.2.0",
     "karma-coverage-istanbul-reporter": "~2.0.1",
     "karma-jasmine": "~1.1.2",
     "karma-jasmine-html-reporter": "^0.2.2",
     "ng-packagr": "^9.0.0",
     "protractor": "^5.4.3",
-    "ts-node": "~7.0.0",
+    "ts-node": "^8.8.1",
     "tslint": "~5.11.0",
     "typescript": "~3.8.3"
   }