Revert "replace valid attrs with an optimized regex"
Revert "replace valid attrs with an optimized regex"

This reverts commit 5905e70c4ca47faf3666eef39ac6086f74f36c66.

JamieDixon/styled-components,styled-components/styled-components,JamieDixon/styled-components,styled-components/styled-components,JamieDixon/styled-components,styled-components/styled-components,css-components/styled-components