Bump ligo-skymap from 1.0.7 to 2.0.0 (#307)

Bumps [ligo-skymap](https://github.com/lpsinger/ligo.skymap) from 1.0.7 to 2.0.0.
- [Changelog](https://github.com/lpsinger/ligo.skymap/blob/main/CHANGES.rst)
- [Commits](lpsinger/ligo.skymap@v1.0.7...v2.0.0)

---
updated-dependencies:
- dependency-name: ligo-skymap
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements/requirements_api.txt

@@ -23,7 +23,7 @@ requests==2.31.0
 sshtunnel==0.4.0
 supervisor==4.2.5
 uvloop==0.17.0
-ligo.skymap==1.0.7
+ligo.skymap==2.0.0
 mocpy==0.12.3
 healpy==1.16.2
 scipy==1.10.1