message: fixup! Update element capitalization in tests
diff: // Jest Snapshot v1, https://goo.gl/fbAQLP
  -exports[`Heading should render as H1 element, when passed "h1" for the element prop 1`] = `
  +exports[`Heading should render as h1 element, when passed "h1" for the element prop 1`] = `
  .circuit-0 {
  font-weight: 800;
  -webkit-margin-before: 0;
  @@ -21,7 +21,7 @@ exports[`Heading should render as H1 element, when passed "h1" for the element p
  </h1>
  `;
  -exports[`Heading should render as H2 element, when passed "h2" for the element prop 1`] = `
  +exports[`Heading should render as h2 element, when passed "h2" for the element prop 1`] = `
  .circuit-0 {
  font-weight: 800;
  -webkit-margin-before: 0;
  @@ -42,7 +42,7 @@ exports[`Heading should render as H2 element, when passed "h2" for the element p
  </h2>
  `;
  -exports[`Heading should render as H3 element, when passed "h3" for the element prop 1`] = `
  +exports[`Heading should render as h3 element, when passed "h3" for the element prop 1`] = `
  .circuit-0 {
  font-weight: 800;
  -webkit-margin-before: 0;
  @@ -63,7 +63,7 @@ exports[`Heading should render as H3 element, when passed "h3" for the element p
  </h3>
  `;
  -exports[`Heading should render as H4 element, when passed "h4" for the element prop 1`] = `
  +exports[`Heading should render as h4 element, when passed "h4" for the element prop 1`] = `
  .circuit-0 {
  font-weight: 800;
  -webkit-margin-before: 0;
  @@ -84,7 +84,7 @@ exports[`Heading should render as H4 element, when passed "h4" for the element p
  </h4>
  `;
  -exports[`Heading should render as H5 element, when passed "h5" for the element prop 1`] = `
  +exports[`Heading should render as h5 element, when passed "h5" for the element prop 1`] = `
  .circuit-0 {
  font-weight: 800;
  -webkit-margin-before: 0;
  @@ -105,7 +105,7 @@ exports[`Heading should render as H5 element, when passed "h5" for the element p
  </h5>
  `;
  -exports[`Heading should render as H6 element, when passed "h6" for the element prop 1`] = `
  +exports[`Heading should render as h6 element, when passed "h6" for the element prop 1`] = `
  .circuit-0 {
  font-weight: 800;
  -webkit-margin-before: 0;
  