chore: publish

- @react-navigation/bottom-tabs@5.0.0-alpha.23
 - @react-navigation/core@5.0.0-alpha.26
 - @react-navigation/drawer@5.0.0-alpha.25
 - @react-navigation/material-bottom-tabs@5.0.0-alpha.22
 - @react-navigation/material-top-tabs@5.0.0-alpha.20
 - @react-navigation/native-stack@5.0.0-alpha.15
 - @react-navigation/stack@5.0.0-alpha.40

packages/native-stack/CHANGELOG.md

@@ -3,6 +3,17 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+# [5.0.0-alpha.15](https://github.com/react-navigation/navigation-ex/compare/@react-navigation/native-stack@5.0.0-alpha.14...@react-navigation/native-stack@5.0.0-alpha.15) (2019-12-07)
+
+
+### Features
+
+* export underlying views used to build navigators ([#191](https://github.com/react-navigation/navigation-ex/issues/191)) ([d618ab3](https://github.com/react-navigation/navigation-ex/commit/d618ab382ecc5eccbcd5faa89e76f9ed2d75f405))
+
+
+
+
+
 # [5.0.0-alpha.14](https://github.com/react-navigation/navigation-ex/compare/@react-navigation/native-stack@5.0.0-alpha.13...@react-navigation/native-stack@5.0.0-alpha.14) (2019-11-20)
 
 **Note:** Version bump only for package @react-navigation/native-stack

packages/native-stack/package.json

@@ -6,7 +6,7 @@
     "react-native",
     "react-navigation"
   ],
-  "version": "5.0.0-alpha.14",
+  "version": "5.0.0-alpha.15",
   "license": "MIT",
   "repository": {
     "type": "git",