Update pxt-monaco-typescript to guard against empty completion entries
Update pxt-monaco-typescript to guard against empty completion entries

switchinnovations/pxt,playi/pxt,Microsoft/pxt,switch-education/pxt,Microsoft/pxt,switch-education/pxt,switchinnovations/pxt,switchinnovations/pxt,switch-education/pxt,switchinnovations/pxt,playi/pxt,Microsoft/pxt,switch-education/pxt,playi/pxt,playi/pxt,Microsoft/pxt,Microsoft/pxt,switch-education/pxt