NEP29: Test PyGMT on NumPy 1.22 (#1701)

Bumps [numpy](https://github.com/numpy/numpy) from 1.21.4 to 1.22.0 released on 31 December 2021.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/v1.22.0/doc/changelog/1.22.0-changelog.rst)
- [Commits](numpy/numpy@v1.21.4...v1.22.0)

.github/workflows/ci_tests.yaml

@@ -44,14 +44,14 @@ jobs:
           # - os: ubuntu-latest
           #   python-version: 3.7
           #   isDraft: true
-        # Pair Python 3.8 with NumPy 1.19 and Python 3.9 with NumPy 1.21
-        # Only install optional packages on Python 3.9/NumPy 1.21
+        # Pair Python 3.8 with NumPy 1.19 and Python 3.9 with NumPy 1.22
+        # Only install optional packages on Python 3.9/NumPy 1.22
         include:
           - python-version: '3.8'
             numpy-version: '1.19'
             optional-packages: ''
           - python-version: '3.9'
-            numpy-version: '1.21'
+            numpy-version: '1.22'
             optional-packages: 'geopandas ipython'
     timeout-minutes: 30
     defaults: