Update storybook monorepo to v5.0.6 (patch)

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
@​storybook/addon-actions	devDependencies	patch	5.0.5 -> 5.0.6	source
@​storybook/addon-links	devDependencies	patch	5.0.5 -> 5.0.6	source
@​storybook/addon-notes	devDependencies	patch	5.0.5 -> 5.0.6	source
@​storybook/addons	devDependencies	patch	5.0.5 -> 5.0.6	source
@​storybook/angular	devDependencies	patch	5.0.5 -> 5.0.6	source
@​storybook/cli	devDependencies	patch	5.0.5 -> 5.0.6	source

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Release Notes

storybooks/storybook

### [`v5.0.6`](https://togithub.com/storybooks/storybook/blob/master/CHANGELOG.md#​506-April-1-2019) [Compare Source](https://togithub.com/storybooks/storybook/compare/v5.0.5...v5.0.6) ##### Bug Fixes - Addon-a11y: Fix color-blindness emulation in Firefox ([#​6297](https://togithub.com/storybooks/storybook/pull/6297)) - Addon-info: Fixed contrast of Show Info button for a11y ([#​6301](https://togithub.com/storybooks/storybook/pull/6301)) - Addon-cssresources: Fix panel layout ([#​6263](https://togithub.com/storybooks/storybook/pull/6263)) - Addon-info: forwardRef elements use displayName if available ([#​6222](https://togithub.com/storybooks/storybook/pull/6222)) - UI: Set expanded stories to objects instead of arrays ([#​6290](https://togithub.com/storybooks/storybook/pull/6290)) - Addon-actions: safe render for cyclic obj ([#​6240](https://togithub.com/storybooks/storybook/pull/6240)) - Core: Upgrade [@​babel/preset-env](https://togithub.com/babel/preset-env) to fix corejs option ([#​6281](https://togithub.com/storybooks/storybook/pull/6281)) - Core: Enforces corejs v2 for babel ([#​6267](https://togithub.com/storybooks/storybook/pull/6267)) - Knobs: Rename ALL panel to Other for ungrouped knobs ([#​6232](https://togithub.com/storybooks/storybook/pull/6232))

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