DEP: Bump min version of dateutil to 2.7.3 (#33363)

Author: ShaharNaveh

Diff for: ci/deps/azure-36-minimum_versions.yaml

@@ -22,7 +22,7 @@ dependencies:
   - numpy=1.13.3
   - openpyxl=2.5.7
   - pytables=3.4.2
-  - python-dateutil=2.6.1
+  - python-dateutil=2.7.3
   - pytz=2017.2
   - scipy=0.19.0
   - xlrd=1.1.0

Diff for: ci/deps/azure-macos-36.yaml

@@ -23,7 +23,7 @@ dependencies:
   - openpyxl
   - pyarrow>=0.13.0
   - pytables
-  - python-dateutil==2.6.1
+  - python-dateutil==2.7.3
   - pytz
   - xarray
   - xlrd

Diff for: doc/source/getting_started/install.rst

@@ -221,7 +221,7 @@ Package                                                          Minimum support
 ================================================================ ==========================
 `setuptools <https://setuptools.readthedocs.io/en/latest/>`__    24.2.0
 `NumPy <https://www.numpy.org>`__                                1.13.3
-`python-dateutil <https://dateutil.readthedocs.io/en/stable/>`__ 2.6.1
+`python-dateutil <https://dateutil.readthedocs.io/en/stable/>`__ 2.7.3
 `pytz <https://pypi.org/project/pytz/>`__                        2017.2
 ================================================================ ==========================
 

Diff for: doc/source/whatsnew/v1.1.0.rst

@@ -94,6 +94,19 @@ Other enhancements
 
 .. ---------------------------------------------------------------------------
 
+Increased minimum versions for dependencies
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Some minimum supported versions of dependencies were updated (:issue:`29766`, :issue:`29723`).
+If installed, we now require:
+
++-----------------+-----------------+----------+---------+
+| Package         | Minimum Version | Required | Changed |
++=================+=================+==========+=========+
+| python-dateutil | 2.7.3           |    X     |         |
++-----------------+-----------------+----------+---------+
+
+
 Development Changes
 ^^^^^^^^^^^^^^^^^^^
 

Diff for: environment.yml

@@ -5,7 +5,7 @@ dependencies:
   # required
   - numpy>=1.15
   - python=3
-  - python-dateutil>=2.6.1
+  - python-dateutil>=2.7.3
   - pytz
 
   # benchmarks

Diff for: requirements-dev.txt

@@ -2,7 +2,7 @@
 # See that file for comments about the need/usage of each dependency.
 
 numpy>=1.15
-python-dateutil>=2.6.1
+python-dateutil>=2.7.3
 pytz
 asv
 cython>=0.29.16

Diff for: setup.py

@@ -747,7 +747,7 @@ def srcpath(name=None, suffix=".pyx", subdir="src"):
 def setup_package():
     setuptools_kwargs = {
         "install_requires": [
-            "python-dateutil >= 2.6.1",
+            "python-dateutil >= 2.7.3",
             "pytz >= 2017.2",
             f"numpy >= {min_numpy_ver}",
         ],