Revert "fixed a bug where it behaved unexpectedly when the mask contained number"
Revert "fixed a bug where it behaved unexpectedly when the mask contained number"

cybertk/VMaskTextField,cybertk/VMaskTextField,nfox513/VMaskTextField,viniciusmo/VMaskTextField,0359xiaodong/VMaskTextField,cybertk/VMaskTextField,nfox513/VMaskTextField,viniciusmo/VMaskTextField,0359xiaodong/VMaskTextField,0359xiaodong/VMaskTextField,nfox513/VMaskTextField