chore(deps): bump skyfield from 1.37 to 1.38

Bumps [skyfield](https://github.com/brandon-rhodes/python-skyfield) from 1.37 to 1.38.
- [Release notes](https://github.com/brandon-rhodes/python-skyfield/releases)
- [Changelog](https://github.com/skyfielders/python-skyfield/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/brandon-rhodes/python-skyfield/compare/1.37...1.38)

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

Pipfile.lock

@@ -109,10 +109,10 @@
         },
         "skyfield": {
             "hashes": [
-                "sha256:64d2716187b94ccb587ec6db46ecb252fb14ecc3b32ef37ce6e90683bb5956cb"
+                "sha256:65af2298a88cbfe4f30d997baf0c3c5371e9850603e340b8d92d476331a221e2"
             ],
             "index": "pypi",
-            "version": "==1.37"
+            "version": "==1.38"
         },
         "tabulate": {
             "hashes": [
@@ -329,7 +329,6 @@
                 "sha256:2f4da4594db7e1e110a944bb1b551fdf4e6c136ad42e4234131391e21eb5b0df",
                 "sha256:e7b021f7241115872f92f43c6508082facffbd1c048e3c6e2bb9c2a157e28937"
             ],
-            "index": "pypi",
             "version": "==1.26.4"
         },
         "wrapt": {