pin isort (#4206)

* pin isort for now

* also pin isort for all other CI

* pin isort to the exact version

Author: keewis

ci/requirements/py36-min-all-deps.yml

@@ -23,7 +23,7 @@ dependencies:
   - hdf5=1.10
   - hypothesis
   - iris=2.2
-  - isort
+  - isort=4.3.21
   - lxml=4.4  # Optional dep of pydap
   - matplotlib=3.1
   - mypy=0.761  # Must match .pre-commit-config.yaml

ci/requirements/py36.yml

@@ -19,7 +19,7 @@ dependencies:
   - hdf5
   - hypothesis
   - iris
-  - isort
+  - isort=4.3.21
   - lxml    # Optional dep of pydap
   - matplotlib
   - mypy=0.761  # Must match .pre-commit-config.yaml

ci/requirements/py37-windows.yml

@@ -19,7 +19,7 @@ dependencies:
   - hdf5
   - hypothesis
   - iris
-  - isort
+  - isort=4.3.21
   - lxml    # Optional dep of pydap
   - matplotlib
   - mypy=0.761  # Must match .pre-commit-config.yaml

ci/requirements/py37.yml

@@ -19,7 +19,7 @@ dependencies:
   - hdf5
   - hypothesis
   - iris
-  - isort
+  - isort=4.3.21
   - lxml    # Optional dep of pydap
   - matplotlib
   - mypy=0.761  # Must match .pre-commit-config.yaml

ci/requirements/py38-all-but-dask.yml

@@ -16,7 +16,7 @@ dependencies:
   - h5py
   - hdf5
   - hypothesis
-  - isort
+  - isort=4.3.21
   - lxml    # Optional dep of pydap
   - matplotlib
   - mypy=0.761  # Must match .pre-commit-config.yaml

ci/requirements/py38.yml

@@ -19,7 +19,7 @@ dependencies:
   - hdf5
   - hypothesis
   - iris
-  - isort
+  - isort=4.3.21
   - lxml    # Optional dep of pydap
   - matplotlib
   - mypy=0.780  # Must match .pre-commit-config.yaml