Update prettier to latest version (to support typescript)

This MR updates the version of prettier to one that fully supports typescript. Since there is a change of major version, the code style has changed.

I tried to minimize the change of .js,.jsx,*.scss files by setting options to the previous default (see 68892aec), yet some style get's changed.

I left the new default for typescript.

attn @sfisher @valentin.valls