[3.x] Fix when column name includes hyphen (-)

[hnassr]

No description provided.

[Smolevich]

What is the root point for this PR?
Can you show bug or problem with code in master branch?

[Smolevich]

Failed test https://github.com/jenssegers/laravel-mongodb/pull/2127/checks?check_run_id=1275374233

[hnassr]

What is the root point for this PR?
Can you show bug or problem with code in master branch?

when i try this:

$users = \App\Users::where('user-phone', 'LIKE', '%123%')->get();

i got this exception:

MongoDB/Driver/Exception/CommandException with message 'ReferenceError: phone is not defined : @:1:15

@Smolevich

[divine]

This fixes another "bug" that was added in #2020

[divine]

What's the reason you've closed this PR?

[hnassr]

I think the problem occurred when the column name include hyphen like this user-age, so you cannot call it like this this.user-age, when i call it like this this["user-age"] the test run successfully.

[divine]

Thank you for contribution!