Update storybook monorepo to ^5.3.18

Created by: renovate[bot]

This PR contains the following updates:

Package	Type	Update	New value	References	Sourcegraph
@storybook/addon-actions	devDependencies	patch	^5.3.18	source
@storybook/addon-info	devDependencies	patch	^5.3.18	source
@storybook/addon-knobs	devDependencies	patch	^5.3.18	source
@storybook/addon-links	devDependencies	patch	^5.3.18	source
@storybook/addon-options	devDependencies	patch	^5.3.18	source
@storybook/addon-storyshots	devDependencies	patch	^5.3.18	source
@storybook/addons	devDependencies	patch	^5.3.18	source
@storybook/components	devDependencies	patch	^5.3.18	source
@storybook/core	devDependencies	patch	^5.3.18	source
@storybook/react	devDependencies	patch	^5.3.18	source
@storybook/theming	devDependencies	patch	^5.3.18	source

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Release Notes

storybookjs/storybook

v5.3.18

Compare Source

Bug Fixes

• Core: Fix manager assets to be routed in express (#​9646)
• Storyshots: Fix MDX transform (#​10223)
• Addon-docs: Restore IE11 compat on Windows by transpiling acorn-jsx (#​9790)
• Addon-docs: Ensure visibility of links within prop descriptions (#​10210)

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