Update pyshp requirement from ~=2.2.0 to ~=2.3.1 in /api

Updates the requirements on [pyshp](https://github.com/GeospatialPython/pyshp) to permit the latest version.
- [Release notes](https://github.com/GeospatialPython/pyshp/releases)
- [Changelog](https://github.com/GeospatialPython/pyshp/blob/master/changelog.txt)
- [Commits](https://github.com/GeospatialPython/pyshp/compare/2.2.0...2.3.1)

---
updated-dependencies:
- dependency-name: pyshp
  dependency-type: direct:production
...

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

api/requirements.txt

@@ -10,5 +10,5 @@ pyyaml<6
 sqlparse~=0.4.2
 sqlalchemy[asyncio]~=1.4.32
 asyncpg~=0.24.0
-pyshp~=2.2.0
+pyshp~=2.3.1
 alembic~=1.7.7

api/setup.py

@@ -20,7 +20,7 @@ setup(
         "pyyaml<6",
         "sqlparse~=0.4.2",
         "openmaptiles-tools",  # install from git
-        "pyshp~=2.2.0",
+        "pyshp>=2.2,<2.4",
         "sqlalchemy[asyncio]~=1.4.25",
         "asyncpg~=0.24.0",
         "alembic~=1.7.7",