Don't use upper bound dependencies any more

See https://iscinumpy.dev/post/bound-version-constraints/ for the rationale behind this change.

Closes #1800

setup.py

@@ -42,21 +42,21 @@ setup(
     include_package_data=True,
     python_requires=">=3.7",
     install_requires=[
-        "asgiref>=3.2.10,<3.6.0",
-        "click>=7.1.1,<8.2.0",
+        "asgiref>=3.2.10",
+        "click>=7.1.1",
         "click-default-group-wheel>=1.2.2",
-        "Jinja2>=2.10.3,<3.1.0",
-        "hupper~=1.9",
+        "Jinja2>=2.10.3",
+        "hupper>=1.9",
         "httpx>=0.20",
-        "pint~=0.9",
-        "pluggy>=1.0,<1.1",
-        "uvicorn~=0.11",
-        "aiofiles>=0.4,<0.9",
-        "janus>=0.6.2,<1.1",
+        "pint>=0.9",
+        "pluggy>=1.0",
+        "uvicorn>=0.11",
+        "aiofiles>=0.4",
+        "janus>=0.6.2",
         "asgi-csrf>=0.9",
-        "PyYAML>=5.3,<7.0",
-        "mergedeep>=1.1.1,<1.4.0",
-        "itsdangerous>=1.1,<3.0",
+        "PyYAML>=5.3",
+        "mergedeep>=1.1.1",
+        "itsdangerous>=1.1",
     ],
     entry_points="""
         [console_scripts]
@@ -72,14 +72,14 @@ setup(
             "sphinx-copybutton",
         ],
         "test": [
-            "pytest>=5.2.2,<7.2.0",
-            "pytest-xdist>=2.2.1,<2.6",
-            "pytest-asyncio>=0.17,<0.20",
-            "beautifulsoup4>=4.8.1,<4.12.0",
+            "pytest>=5.2.2",
+            "pytest-xdist>=2.2.1",
+            "pytest-asyncio>=0.17",
+            "beautifulsoup4>=4.8.1",
             "black==22.6.0",
             "blacken-docs==1.12.1",
-            "pytest-timeout>=1.4.2,<2.2",
-            "trustme>=0.7,<0.10",
+            "pytest-timeout>=1.4.2",
+            "trustme>=0.7",
             "cogapp>=3.3.0",
         ],
         "rich": ["rich"],