Update storybook monorepo to v5.1.11 (patch)

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
@storybook/addon-actions	devDependencies	patch	5.1.10 -> 5.1.11
@storybook/addon-links	devDependencies	patch	5.1.10 -> 5.1.11
@storybook/addon-notes	devDependencies	patch	5.1.10 -> 5.1.11
@storybook/addons	devDependencies	patch	5.1.10 -> 5.1.11
@storybook/angular	devDependencies	patch	5.1.10 -> 5.1.11
@storybook/cli	devDependencies	patch	5.1.10 -> 5.1.11

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Release Notes

storybookjs/storybook

### [`v5.1.11`](https://togithub.com/storybookjs/storybook/blob/master/CHANGELOG.md#​5111-August-13-2019) [Compare Source](https://togithub.com/storybookjs/storybook/compare/v5.1.10...v5.1.11) ##### Bug Fixes - Core: Add polyfill for fetch ([#​7401](https://togithub.com/storybookjs/storybook/pull/7401)) - Core: Revert "Fix [#​7167](https://togithub.com/storybookjs/storybook/issues/7167) addon-centered causes component to disappear when zooming" ([#​7750](https://togithub.com/storybookjs/storybook/pull/7750))

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