fix(pagination): remove invalid aria role

[austingreendev]

Description

This is a continuation of the accessibility tweaks in #66. It includes:

• Modals
  • Update markdown examples to include aria-label on <Close /> usages
• Nofitications
  • Update markdown examples to include aria-label on <Close /> usages
• Tables
  • Update markdown examples to include aria-label on <IconButton /> usages
• Pagination
  • Originally I had a [role="navigation"] placed on the Pagination containing element. Turns out this is invalid and it should retain the listbox role applied by the SelectionContainer. This updates our default aria-label to be more descriptive.

Checklist

• 👌 design updates are Garden Designer approved (add the
  designer as a reviewer)
• 💅 view component styling is based on a Garden CSS
  component
• 🌐 Styleguidist demo is up-to-date (yarn start)
• ⬅️ renders as expected with reversed (RTL) direction
• 💂‍♂️ includes new unit and snapshot tests
• 📒 any new files are included in the packages src/index.js export
• 📝 tested in Chrome, Firefox, Safari, Edge, and IE11

[coveralls]

Coverage decreased (-0.001%) to 96.123% when pulling 738787b on agreen/documentation-accessability into 09cb171 on master.

[jzempel]

@Austin94 can we appease code cov on this one?

[austingreendev]

@jzempel I think this is just complaining because I removed a line, which is lowering the overall project coverage.

The react-pagination package is currently at 100% coverage 👊

Is there a setting to only look at changed files? Also, jest coverage has us at 99% while coveralls is at 96%. Not sure where the missmatch is coming from.

[austingreendev]

@ryanseddon going to merge since you already approved in #66 🙇