revert to single core CI (#368)

Author: jGaboardi

.github/workflows/tests.yaml

@@ -60,7 +60,7 @@ jobs:
 
       - name: Test momepy
         run: |
-          pytest -v -n auto --color yes --cov-config .coveragerc --cov momepy --cov-append --cov-report term-missing --cov-report xml tests
+          pytest -v --color yes --cov-config .coveragerc --cov momepy --cov-append --cov-report term-missing --cov-report xml tests
 
       - name: Test user guide
         if: contains(matrix.env, '39-latest.yaml') && contains(matrix.os, 'ubuntu')

ci/envs/310-dev.yaml

@@ -9,7 +9,6 @@ dependencies:
   - tqdm
   - pytest
   - pytest-cov
-  - pytest-xdist
   - codecov
   - pip
   - osmnx

ci/envs/310-latest.yaml

@@ -9,7 +9,6 @@ dependencies:
   - tqdm
   - pytest
   - pytest-cov
-  - pytest-xdist
   - codecov
   - mapclassify
   - osmnx

ci/envs/38-minimal.yaml

@@ -9,7 +9,6 @@ dependencies:
   - tqdm=4.27.0
   - pytest
   - pytest-cov
-  - pytest-xdist
   - codecov
   - mapclassify
   - osmnx

ci/envs/39-latest.yaml

@@ -12,7 +12,6 @@ dependencies:
   # testing
   - pytest
   - pytest-cov
-  - pytest-xdist
   - codecov
   # user guide testing
   - osmnx