Separate query and command types in $db update operations

[danswann]

Changes types so that partial structure of the update command is no longer inferred from the structure of the update query.

Fixes #227 and goes a little further to enable type-switching, e.g.:

$db.u({value:"hello"}, {$set:{value:27}});

This does mean you lose out on query-based intellisense while constructing the command, e.g.:

so it's not a cost-free change.

[samualtnorman]

I have made a change, please can you check out the new @dev version. sorry about your PR but I went with a different approach to solving your issue

[danswann]

No luck for me on 0.21.1-7696939, same error as in #227.

(The final example where I'm not getting yelled at seems like a different bug where using a $-operator in the query breaks inference in the command).

[danswann]

I'm happy to toss the PR if you want to move the convo back to the issue and do it your way.

[samualtnorman]

No luck for me on 0.21.1-7696939, same error as in #227.

(The final example where I'm not getting yelled at seems like a different bug where using a $-operator in the query breaks inference in the command).

I am getting different behaviour with the same code, are you sure you restarted your TS server?

[danswann]

I am instead sure that I didn't do that. Your fix LGTM.