support shebang line recognition for tclsh and expect

[jghub]

bat supports Tcl syntax highlighting but solely relies on presence of .tcl file extender. please add support for recognition of shebang lines matching glob patterns

#!*tcl
#!*expect

for triggering Tcl syntax highlighting (Expect is a Tcl library for which also a standalone executable utility incorporating a full Tcl interpreter exists, so "Expect" files exhibit standard Tcl syntax).

[keith-hall]

FYI there is a PR at sublimehq/Packages#4407
Note that it won't solve this issue immediately because bat uses syntect, which doesn't support all the sublime-syntax features which Sublime Text does. So we can't just bump the submodule version, and would need to add a patch like is done for other syntaxes in this repo.

[jghub]

thanks, and understood.