Fix/dayjs default export

[jamesray]

changes import dayjs from 'dayjs' to import * as dayjs from 'dayjs' to fix

DAYJS@1.11.11/NODE_MODULES/DAYJS/PLUGIN/ADVANCEDFORMAT.JS?V=8016E08E' DOES NOT PROVIDE AN EXPORT NAMED 'DEFAULT'

[stephiescastle]

@jamesray Noticed that we're now getting these errors when building the vue package and the vue storybook:

src/components/CalendarButton/CalendarButton.vue?vue&type=script&lang.ts (45:31): Cannot call a namespace ("dayjs").
src/components/CalendarButton/CalendarButton.vue?vue&type=script&lang.ts (46:29): Cannot call a namespace ("dayjs").
src/components/MissionDetailStats/DistanceStats.vue?vue&type=script&lang.ts (69:21): Cannot call a namespace ("dayjs").
src/components/MissionDetailStats/DistanceStats.vue?vue&type=script&lang.ts (69:30): Cannot call a namespace ("dayjs").
src/components/SearchResultsList/SearchResultsList.vue?vue&type=script&lang.ts (48:15): Cannot call a namespace ("dayjs").

Were the changes in this PR fixing anything? Or were they made as a precaution? If just a precaution, then I would recommend we change it back.