ylproj/jupyterlab @ c12b3c4eeb5f9ffaa88f4314743ef1a9b8472c02

Jason Grout 1e1aceb922 Fix test typescript errors.		7 lat temu
..
factories.spec.ts	75a61d50fe Fix tests.	7 lat temu
latex.spec.ts	1bb59caa1e Exit appveyor on failure (#3481)	7 lat temu
mimemodel.spec.ts	1bb59caa1e Exit appveyor on failure (#3481)	7 lat temu
outputmodel.spec.ts	1bb59caa1e Exit appveyor on failure (#3481)	7 lat temu
registry.spec.ts	1e1aceb922 Fix test typescript errors.	7 lat temu