Move to storybook 5

[dr3]

Overall change: Move to storybook 5

Code changes:

• Swap the readme addon for the notes one
• Update webpack config

---

'import/no-extraneous-dependencies': 'off'

So, awkward, turns out this never worked... If you go on latest and log paths on line 71 of node_modules/eslint-plugin-import/lib/rules/no-extraneous-dependencies.js it logs

[ '/Users/mcmild07/dev/psammead/package.json',
  '/Users/mcmild07/package.json' ]

instead of what we expected;

[ '/Users/mcmild07/dev/psammead/packages/components/psammead-image/package.json',
  '/Users/mcmild07/dev/psammead/package.json' ]

I will raise an issue to fix this properly (#340), if possible, but for now theres no harm disabling it as it pretty much already is

---

• I have assigned myself to this PR and the corresponding issues
• Tests added for new features
• Test engineer approval

[dr3]

I have added this as without it you lose the word 'Psammead' from the top left

[sareh]

This looks great locally. ✨ I've just added some comments about updating links in Readmes and tidying up the notes implementation.

[sareh]

👍 Works great locally.

[ChrisBAshton]

Looks good to me!

[ChrisBAshton]

Does this PR solve #266?

[dr3]

@ChrisBAshton Nope

[dr3]

Tested locally. All acts as expected except for the amp stories which require a refresh, howeve that was the case before.