Fix emojification of symbol characters
Fix emojification of symbol characters

Emojione has graphics for a lot of the symbol / dingbat characters
which are within the basic multilingual plane, but the new
fast-path regex was only detecthing surrogate pairs, so not
counting the symbols as emoji.

matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,aperezdc/matrix-react-sdk,matrix-org/matrix-react-sdk,aperezdc/matrix-react-sdk,matrix-org/matrix-react-sdk,aperezdc/matrix-react-sdk,aperezdc/matrix-react-sdk