Added exceptiongroup to docs requirements

Author: agronholm

docs-requirements.in

@@ -13,6 +13,7 @@ async_generator >= 1.9
 idna
 outcome
 sniffio
+exceptiongroup
 
 # See note in test-requirements.in
 immutables >= 0.6

docs-requirements.txt

@@ -1,8 +1,8 @@
 #
-# This file is autogenerated by pip-compile
+# This file is autogenerated by pip-compile with python 3.7
 # To update, run:
 #
-#    pip-compile --output-file docs-requirements.txt docs-requirements.in
+#    pip-compile --output-file=docs-requirements.txt docs-requirements.in
 #
 alabaster==0.7.12
     # via sphinx
@@ -28,6 +28,8 @@ docutils==0.17.1
     # via
     #   sphinx
     #   sphinx-rtd-theme
+exceptiongroup==1.0.0rc1
+    # via -r docs-requirements.in
 idna==3.3
     # via
     #   -r docs-requirements.in
@@ -36,6 +38,8 @@ imagesize==1.2.0
     # via sphinx
 immutables==0.16
     # via -r docs-requirements.in
+importlib-metadata==4.10.1
+    # via click
 incremental==21.3.0
     # via towncrier
 jinja2==3.0.2
@@ -87,5 +91,14 @@ toml==0.10.2
     # via towncrier
 towncrier==21.3.0
     # via -r docs-requirements.in
+typing-extensions==4.0.1
+    # via
+    #   immutables
+    #   importlib-metadata
 urllib3==1.26.7
     # via requests
+zipp==3.7.0
+    # via importlib-metadata
+
+# The following packages are considered to be unsafe in a requirements file:
+# setuptools