vim: improve syntax highlighting for `typealias`
vim: improve syntax highlighting for `typealias`

This improves the detection of syntax so that the identifier for a
typealias is identified as an identifier, the `=` is identified as a
delimiter, and the type that is aliased is identified as a type.

tkremenek/swift,karwa/swift,tkremenek/swift,aschwaighofer/swift,benlangmuir/swift,glessard/swift,JGiola/swift,lorentey/swift,aschwaighofer/swift,devincoughlin/swift,apple/swift,atrick/swift,harlanhaskins/swift,shajrawi/swift,gribozavr/swift,hooman/swift,karwa/swift,jckarter/swift,airspeedswift/swift,airspeedswift/swift,rudkx/swift,xedin/swift,hooman/swift,atrick/swift,CodaFi/swift,xedin/swift,devincoughlin/swift,apple/swift,sschiau/swift,devincoughlin/swift,sschiau/swift,harlanhaskins/swift,ahoppen/swift,gregomni/swift,nathawes/swift,jmgc/swift,airspeedswift/swift,karwa/swift,CodaFi/swift,apple/swift,xedin/swift,tkremenek/swift,aschwaighofer/swift,rudkx/swift,glessard/swift,hooman/swift,allevato/swift,gribozavr/swift,shahmishal/swift,xedin/swift,parkera/swift,tkremenek/swift,ahoppen/swift,shahmishal/swift,lorentey/swift,apple/swift,lorentey/swift,atrick/swift,sschiau/swift,xwu/swift,parkera/swift,airspeedswift/swift,glessard/swift,JGiola/swift,karwa/swift,atrick/swift,xwu/swift,karwa/swift,shajrawi/swift,allevato/swift,stephentyrone/swift,aschwaighofer/swift,CodaFi/swift,ahoppen/swift,aschwaighofer/swift,nathawes/swift,hooman/swift,shahmishal/swift,jmgc/swift,roambotics/swift,karwa/swift,benlangmuir/swift,CodaFi/swift,aschwaighofer/swift,jckarter/swift,lorentey/swift,JGiola/swift,devincoughlin/swift,shajrawi/swift,shajrawi/swift,jmgc/swift,shahmishal/swift,lorentey/swift,roambotics/swift,jmgc/swift,stephentyrone/swift,shajrawi/swift,apple/swift,gregomni/swift,tkremenek/swift,sschiau/swift,airspeedswift/swift,allevato/swift,rudkx/swift,devincoughlin/swift,benlangmuir/swift,ahoppen/swift,gregomni/swift,glessard/swift,harlanhaskins/swift,jmgc/swift,stephentyrone/swift,allevato/swift,roambotics/swift,rudkx/swift,xwu/swift,karwa/swift,stephentyrone/swift,JGiola/swift,lorentey/swift,aschwaighofer/swift,gregomni/swift,glessard/swift,CodaFi/swift,atrick/swift,shahmishal/swift,jmgc/swift,nathawes/swift,parkera/swift,xedin/swift,jckarter/swift,jckarter/swift,sschiau/swift,hooman/swift,devincoughlin/swift,sschiau/swift,harlanhaskins/swift,tkremenek/swift,parkera/swift,shahmishal/swift,gregomni/swift,roambotics/swift,shajrawi/swift,nathawes/swift,xedin/swift,allevato/swift,gribozavr/swift,rudkx/swift,shajrawi/swift,shahmishal/swift,xwu/swift,JGiola/swift,allevato/swift,karwa/swift,gribozavr/swift,parkera/swift,benlangmuir/swift,gribozavr/swift,parkera/swift,xedin/swift,xwu/swift,benlangmuir/swift,glessard/swift,devincoughlin/swift,xwu/swift,gribozavr/swift,nathawes/swift,sschiau/swift,shajrawi/swift,xwu/swift,atrick/swift,rudkx/swift,hooman/swift,benlangmuir/swift,airspeedswift/swift,stephentyrone/swift,airspeedswift/swift,gribozavr/swift,jmgc/swift,jckarter/swift,harlanhaskins/swift,jckarter/swift,ahoppen/swift,lorentey/swift,sschiau/swift,gribozavr/swift,hooman/swift,CodaFi/swift,allevato/swift,stephentyrone/swift,harlanhaskins/swift,apple/swift,roambotics/swift,shahmishal/swift,nathawes/swift,CodaFi/swift,nathawes/swift,gregomni/swift,lorentey/swift,roambotics/swift,JGiola/swift,parkera/swift,jckarter/swift,tkremenek/swift,harlanhaskins/swift,devincoughlin/swift,ahoppen/swift,xedin/swift,parkera/swift,stephentyrone/swift