not smart case by default

[fatsen]

As mention in #34 , the default behavior of sd.exe is 'smart case'.
While in the latest version V1.1.0, it is 'case sensitve' by default.

hello
Hello

after executing sd hello hi 1.txt, it would be:

hi
Hello

OS: Microsoft Windows 10 Professional

Is it possible to change the default behavior, such as modifying the setting file?
(sd -fi hello hi 1.txt is OK.)
Thank you!