enhancement: ability to use ! after the bang

[thecmdrunner]

For example:

theo yt! instead of theo !yt

I've gotten used to this from ddg

[Nusab19]

imo, this would be problematic for the users.

! at the end of a word is very common. For example, if you search for:
Why do people call youtube yt!

Then you are asking a question, but it'll take it as a bang. But on the other side, nobody_(almost)_ uses ! at the beginning of a word.

[mujtabachang]

Duckduckgo supports both. If we are cloning duckduckgo, then we might do it as well.

BTW, this issue is addressed in my PR #42