Upgrade to release v0.22.0

[markdumay]

Release v0.22.0 standardizes and streamlines the validation of shortcode arguments. Although most of the components have been refactored without any impact, a few components required some changes that are not backwards compatible. Review the notes below for each affected component on how to adapt the latest version.

• Breadcrumb
  The breadcrumb partial now requires an explicit page argument. The old code was:

  <div>{{ partial "assets/breadcrumb.html" $page }}</div>
  

  The new invocation is:

  <div>{{ partial "assets/breadcrumb.html" (dict "page" $page) }}</div>
  

• Table
  The prefix table-responsive- has been dropped to denote a responsive size. Instead, use {sm|md|lg|xl|xxl} to create responsive tables up to a particular breakpoint.

  Bootstrap styling attributes now require an explicit class argument. For example, use the following shortcode to accentuate a table with table-striped:

   {{< table class="table-striped" >}}
  

• Image
  The argument outerClass has been renamed to wrapper, and innerClass has been renamed to class. These names are more consistent with the other shortcodes.