add exceptiongroup dev dependency; upgrade pip-tools

requirements_test.txt

@@ -1,6 +1,6 @@
 #
-# This file is autogenerated by pip-compile with python 3.7
-# To update, run:
+# This file is autogenerated by pip-compile with Python 3.8
+# by the following command:
 #
 #    pip-compile --extra=dev --output-file=requirements_test.txt setup.py
 #
@@ -15,12 +15,16 @@ attrs==21.4.0
     #   outcome
     #   pytest
     #   trio
+build==1.2.1
+    # via pip-tools
 cffi==1.15.0
     # via cryptography
 click==8.1.2
     # via pip-tools
 cryptography==36.0.2
     # via trustme
+exceptiongroup==1.2.0 ; python_version < "3.11"
+    # via purerpc (setup.py)
 grpcio==1.44.0
     # via
     #   grpcio-tools
@@ -39,20 +43,16 @@ idna==3.3
     #   trio
     #   trustme
 importlib-metadata==4.11.3
-    # via
-    #   click
-    #   pep517
-    #   pluggy
-    #   pytest
+    # via build
 iniconfig==1.1.1
     # via pytest
 outcome==1.1.0
     # via trio
 packaging==21.3
-    # via pytest
-pep517==0.12.0
-    # via pip-tools
-pip-tools==6.6.0
+    # via
+    #   build
+    #   pytest
+pip-tools==7.4.1
     # via purerpc (setup.py)
 pluggy==1.0.0
     # via pytest
@@ -64,6 +64,10 @@ pycparser==2.21
     # via cffi
 pyparsing==3.0.8
     # via packaging
+pyproject-hooks==1.0.0
+    # via
+    #   build
+    #   pip-tools
 pytest==7.1.1
     # via purerpc (setup.py)
 python-forge==18.6.0
@@ -80,24 +84,20 @@ tblib==1.7.0
     # via purerpc (setup.py)
 tomli==2.0.1
     # via
-    #   pep517
+    #   build
+    #   pip-tools
+    #   pyproject-hooks
     #   pytest
 trio==0.20.0
     # via purerpc (setup.py)
 trustme==0.9.0
     # via purerpc (setup.py)
-typing-extensions==4.1.1
-    # via
-    #   anyio
-    #   importlib-metadata
 uvloop==0.16.0 ; platform_system != "Windows"
     # via purerpc (setup.py)
 wheel==0.37.1
     # via pip-tools
 zipp==3.8.0
-    # via
-    #   importlib-metadata
-    #   pep517
+    # via importlib-metadata
 
 # The following packages are considered to be unsafe in a requirements file:
 # pip

setup.py

@@ -77,6 +77,7 @@ def main():
                 "grpcio-tools<=1.26",
             ],
             'dev': [
+                "exceptiongroup; python_version<'3.11'",
                 "pytest",
                 "grpcio",
                 "grpcio-tools",