setup: do not use a fixed urllib3 version

* ref: cern-sis/issues-inspire#521

.github/workflows/build-and-release.yml

@@ -30,7 +30,6 @@ jobs:
       - name: Install python dependencies
         run: |
           ${{ matrix.pip }} install --user --upgrade pip
-          ${{ matrix.pip }} --no-cache-dir install --user setuptools wheel "urllib3==1.25.11"
           ${{ matrix.pip }} --no-cache-dir install --user -e .[tests,docs]
 
       - name: Show python dependencies
@@ -108,7 +107,6 @@ jobs:
       - name: Install python dependencies
         run: |
           python -m pip install --upgrade pip
-          pip --no-cache-dir install setuptools wheel "urllib3==1.25.11"
           pip --no-cache-dir install -e .[tests,docs]
 
       - name: Show python dependencies

setup.py

@@ -213,15 +213,12 @@ def do_setup():
             'inspire-idutils==1.2.4; python_version == "2.7"',
             'idutils~=1.2,>=1.2.1; python_version >= "3"',
             'isbnid',
-            'inspire-utils~=3.0,>=3.0.0',
+            'inspire-utils',
             'isodate',
             'pyyaml==5.3.0',
             'pytz',
             'rfc3987',
             'six',
-            # requests requires a urllib3 version <1.26 but not 1.25.0 and 1.25.1
-            # we pin it down here to solve dependency problems
-            'urllib3>=1.21.1,<1.26,!=1.25.0,!=1.25.1',
         ],
         tests_require=tests_require,
         extras_require=extras_require,