Meteor 3 compatibility release

[StorytellerCZ]

Based on #59, this PR takes the next step and makes things compatible with Meteor 3.

[StorytellerCZ]

I'm wondering if mtest is compatible with Meteor 3. I see no reason not to, but the cancellation is strange.

[wreiske]

Looking forward to this! I tried getting the latest versions of both running with Meteor 3.0.2 but ran into this...

meteor add mizzao:user-status@2.0.0-beta.0
mizzao:user-status with version constraint 2.0.0-beta.0 has already been added.

wreiske@Wills-MacBook-Pro bluehive-ai % meteor add mizzao:timesync@1.0.0-beta.0
 => Errors while adding packages:             
                                              
While selecting package versions:
error: Conflict: Constraint mizzao:timesync@0.5.4 is not satisfied by mizzao:timesync 1.0.0-beta.0.
Constraints on package "mizzao:timesync":
* mizzao:timesync@1.0.0-beta.0 <- top level
* mizzao:timesync@0.5.4 <- mizzao:user-status 2.0.0-beta.0

[StorytellerCZ]

@wreiske I'll release a new rc for mizzao:user-status to fix this shortly.