Bump GMT version from 6.2.0rc1 to 6.2.0rc2 in CI (#1290)

Second release candidate of Generic Mapping Tools v6.2.0 at
https://github.com/GenericMappingTools/gmt/releases/tag/6.2.0rc2.

* Bump GMT version from 6.2.0rc1 to 6.2.0rc2 in ci_tests.yaml and ci_tests_dev.yaml
* Bump GMT version from 6.1.1 to 6.2.0rc2 in cache data workflow

* Temporarily remove optional geopandas dependency from ci_tests.yaml
* Install geopandas in ci_tests_dev.yaml

Also temporarily pinning to gdal=3.2 so that geopandas and gmt can co-exist.

.github/workflows/cache_data.yaml

@@ -26,7 +26,7 @@ jobs:
 
       # Install GMT
       - name: Install GMT
-        run: conda install -c conda-forge gmt=6.1.1
+        run: conda install -c conda-forge/label/dev gmt=6.2.0rc2
 
       # Download remote files
       - name: Download remote data

.github/workflows/ci_docs.yml

@@ -66,7 +66,7 @@ jobs:
       # Install GMT and other required dependencies from conda-forge
       - name: Install dependencies
         run: |
-          conda install conda-forge/label/dev::gmt=6.2.0rc1 \
+          conda install conda-forge/label/dev::gmt=6.2.0rc2 \
                         numpy pandas xarray netCDF4 packaging \
                         ipython make myst-parser \
                         sphinx sphinx-copybutton sphinx-gallery sphinx_rtd_theme

.github/workflows/ci_tests.yaml

@@ -52,7 +52,7 @@ jobs:
             optional-packages: ''
           - python-version: 3.9
             numpy-version: '1.20'
-            optional-packages: 'geopandas'
+            optional-packages: ''  # 'geopandas'
     defaults:
       run:
         shell: bash -l {0}
@@ -89,7 +89,7 @@ jobs:
       # Install GMT and other required dependencies from conda-forge
       - name: Install dependencies
         run: |
-          conda install conda-forge/label/dev::gmt=6.2.0rc1 \
+          conda install conda-forge/label/dev::gmt=6.2.0rc2 \
                         numpy=${{ matrix.numpy-version }} \
                         pandas xarray netCDF4 packaging \
                         ${{ matrix.optional-packages }} \

.github/workflows/ci_tests_dev.yaml

@@ -83,7 +83,7 @@ jobs:
       # Install dependencies from conda-forge
       - name: Install dependencies
         run: |
-          conda install ninja cmake libblas libcblas liblapack fftw gdal \
+          conda install ninja cmake libblas libcblas liblapack fftw gdal=3.2 geopandas \
                         ghostscript libnetcdf hdf5 zlib curl pcre make dvc
           pip install --pre numpy pandas xarray netCDF4 packaging \
                             ipython pytest-cov pytest-mpl pytest>=6.0 sphinx-gallery

environment.yml

@@ -6,7 +6,7 @@ channels:
 dependencies:
     # Required dependencies
     - pip
-    - gmt=6.2.0rc1
+    - gmt=6.2.0rc2
     - numpy>=1.17
     - pandas
     - xarray