Add DISABLE_WAYLAND to snapcraft.yaml

[gedakc]

See request at:
#511 (comment)

@jshamg @tomwardill if someone could review/test this PR then that would be much appreciated.

We would like to create a 0.10.0 release soon and I plan to merge this PR prior to the release.

Curtis

[jshamg]

@gedakc I would really like to help. I'm not that much into snap. I don't know how to compile that. If you tell me what to do I can test it :) greetings!
Josh

[tomwardill]

I can definitely build and test this on a Ubuntu 19.04 system, but I don't run wayland currently.
I'll see if I can produce a test env for this.
I'll have time today/this evening to have a look.

[tomwardill]

I've built and tested this on a ubuntu 19.04 system, both with and without wayland. Can confirm that manuskript starts and seems to work normally.

[gedakc]

Thank you @tomwardill for testing this PR. And for making it possible to build snap packages in the first place. :-)

I will merge this PR with the develop branch for inclusion in the upcoming 0.10.0 release of Manuskript.

Question:
Will a new snap package be automatically created when we release 0.10.0, or do you need to manually invoke a build?

[tomwardill]

@gedakc I can't help with the release I'm afraid, the package on the store is owned by @olivierkes, so they are handling the releases.
Looks like it might be hooked up via build.snapcraft.io, so a build may be automatic.

[gedakc]

'Hopefully it will be an automatic build. I haven't seen any activity on the project by @olivierkes for quite some time.