Add language-Swift badge to README. [skip ci]
Add language-Swift badge to README. [skip ci]

yoichitgy/Swinject,Swinject/Swinject,Swinject/Swinject,Swinject/Swinject,yoichitgy/Swinject,jondwillis/Swinject,yoichitgy/Swinject,jondwillis/Swinject,Swinject/Swinject,yoichitgy/Swinject,jondwillis/Swinject,jondwillis/Swinject