Bumps [spring-core](https://github.com/spring-projects/spring-framework) from 4.1.2.RELEASE to 4.3.21.RELEASE.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v4.1.2.RELEASE...v4.3.21.RELEASE)

---
updated-dependencies:
- dependency-name: org.springframework:spring-core
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

closes #36

* API method to create a new time-limited shared link
* API method for retrieving the current location given a shared link token
* map view that refreshes the current location every 5 seconds

sends an event when a trip is started or ended

new location web hook also includes active trip

closes #22

closes #16 and #15

return `last` location from database instead of filesystem if no `before` param is set

for #15

drops a bunch of duplicate code now that those libraries exist

closes #21

closes #10

closes #11

for #12

closes #4