Update CI configs

 - Update install command which is deprecated
 - Do not specify dependency versions in setup.cfg by following the best
   practice

.github/workflows/continuous-integration.yml

@@ -28,7 +28,7 @@ jobs:
     - name: Install setuptools
       run: pip install setuptools    
     - name: Install solid
-      run: python setup.py install
+      run: pip install .
     - name: Install pytest
       run: pip install pytest
     - name: Run pytest
@@ -48,7 +48,7 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install solid
-      run: python setup.py install
+      run: pip install .
     - name: Install pytest
       run: pip install pytest
     - name: Run Solid Authorization tests

setup.cfg

@@ -21,8 +21,8 @@ package_dir =
 packages = find:
 python_requires = >=3.7
 install_requires =
-    httpx==0.23.0
-    rdflib==5.0.0
+    httpx
+    rdflib
 
 [options.packages.find]
 where = src

setup.py

@@ -1,2 +1,2 @@
 from setuptools import setup
-setup()
+setup()