fix(deps): bump @vue/composition-api from 1.0.0-beta.19 to 1.0.0-beta.20

Bumps [@vue/composition-api](https://github.com/vuejs/composition-api) from 1.0.0-beta.19 to 1.0.0-beta.20.
- [Release notes](https://github.com/vuejs/composition-api/releases)
- [Changelog](https://github.com/vuejs/composition-api/blob/master/CHANGELOG.md)
- [Commits](vuejs/composition-api@v1.0.0-beta.19...v1.0.0-beta.20)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -26,7 +26,7 @@
     "publish-stories": "build-storybook -o ./storybook"
   },
   "dependencies": {
-    "@vue/composition-api": "^1.0.0-beta.14",
+    "@vue/composition-api": "^1.0.0-beta.20",
     "core-js": "^3.8.0",
     "element-resize-detector": "^1.2.1",
     "interactjs": "^1.10.0"