workaround a bug in angular cli 8.0.4: angular/angular-cli#14876

package.json

@@ -51,27 +51,27 @@
   },
   "private": true,
   "dependencies": {
-    "@angular/animations": "~8.0.1",
-    "@angular/common": "~8.0.1",
-    "@angular/compiler": "~8.0.1",
-    "@angular/core": "~8.0.1",
-    "@angular/forms": "~8.0.1",
-    "@angular/platform-browser": "~8.0.1",
-    "@angular/platform-browser-dynamic": "~8.0.1",
-    "@angular/router": "~8.0.1",
+    "@angular/animations": "~8.0.2",
+    "@angular/common": "~8.0.2",
+    "@angular/compiler": "~8.0.2",
+    "@angular/core": "~8.0.2",
+    "@angular/forms": "~8.0.2",
+    "@angular/platform-browser": "~8.0.2",
+    "@angular/platform-browser-dynamic": "~8.0.2",
+    "@angular/router": "~8.0.2",
     "match-sorter": "2.3.0",
     "moment": "^2.18.1",
     "rxjs": "~6.5.2",
     "tslib": "^1.9.0",
     "zone.js": "~0.9.1"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "~0.800.3",
-    "@angular-devkit/build-ng-packagr": "~0.800.3",
-    "@angular/cli": "~8.0.3",
-    "@angular/compiler-cli": "~8.0.1",
-    "@angular/language-service": "~8.0.1",
-    "@types/node": "~12.0.9",
+    "@angular-devkit/build-angular": "~0.800.4",
+    "@angular-devkit/build-ng-packagr": "~0.800.4",
+    "@angular/cli": "~8.0.4",
+    "@angular/compiler-cli": "~8.0.2",
+    "@angular/language-service": "~8.0.2",
+    "@types/node": "~8.9.4",
     "@types/jasmine": "~3.3.8",
     "@types/jasminewd2": "~2.0.3",
     "codeclimate-test-reporter": "0.5.1",

projects/datepicker/src/lib/date-picker-option.ts

@@ -0,0 +1,5 @@
+export interface DatePickerOptions {
+  openFrom?: MouseEvent;
+  okLabel?: string;
+  cancelLabel?: string;
+}