Update dependency @storybook/react to v5.2.0-beta.40

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
@storybook/react	devDependencies	patch	5.2.0-beta.39 -> 5.2.0-beta.40

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Release Notes

storybookjs/storybook

v5.2.0-beta.40

Compare Source

Bug Fixes

• Addon-docs: Fix DocsPage primary story switching (#​7849)
• Source-loader: Selectively ignore typescript errors in generated code (#​7845)
• Addon-docs: Force hidden attribute on #root element (#​7841)

Maintenance

• Remove temporarily added --no-dll option on examples (#​7647)

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[codecov]

Codecov Report

Merging #88 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #88   +/-   ##
=======================================
  Coverage   98.91%   98.91%           
=======================================
  Files           8        8           
  Lines         370      370           
  Branches      136      136           
=======================================
  Hits          366      366           
  Misses          4        4

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