requirements: Downgrade jedi dependency for ipython compatibility.

ipython < 7.20.0 is incompatible with jedi >= 0.18.0; it fails to
tab-complete in `./manage.py shell`, as described in
ipython/ipython#12740.

We cannot bump the ipython dependency because ipython 7.20.0 requires
Python 3.7, and we must support Python 3.6 due to Ubuntu 18.04
support.  Our only solution is thus to cap the version of `jedi` to
the last one before its API changed.

requirements/common.in

@@ -23,6 +23,11 @@ jsx-lexer
 # Needed for manage.py
 ipython
 
+# Needed for compatibility with ipython < 7.20, which we cannot
+# install on Python <3.7; see
+# https://github.com/ipython/ipython/issues/12740
+jedi<0.18.0
+
 # Needed for image processing
 Pillow
 

requirements/dev.txt

@@ -558,10 +558,12 @@ itemloaders==1.0.4 \
     --hash=sha256:1277cd8ca3e4c02dcdfbc1bcae9134ad89acfa6041bd15b4561c6290203a0c96 \
     --hash=sha256:4cb46a0f8915e910c770242ae3b60b1149913ed37162804f1e40e8535d6ec497
     # via scrapy
-jedi==0.18.0 \
-    --hash=sha256:18456d83f65f400ab0c2d3319e48520420ef43b23a086fdc05dff34132f0fb93 \
-    --hash=sha256:92550a404bad8afed881a137ec9a461fed49eca661414be45059329614ed0707
-    # via ipython
+jedi==0.17.2 \
+    --hash=sha256:86ed7d9b750603e4ba582ea8edc678657fb4007894a12bcf6f4bb97892f31d20 \
+    --hash=sha256:98cc583fa0f2f8304968199b01b6b4b94f469a1f4a74c1560506ca2a211378b5
+    # via
+    #   -r requirements/common.in
+    #   ipython
 jinja2==2.11.3 \
     --hash=sha256:03e47ad063331dd6a3f04a43eddca8a966a26ba0c5b7207a9a9e4e08f1b29419 \
     --hash=sha256:a6d58433de0ae800347cab1fa3043cebbabe8baa9d29e668f1c768cb87a333c6
@@ -880,9 +882,9 @@ parsel==1.6.0 \
     # via
     #   itemloaders
     #   scrapy
-parso==0.8.1 \
-    --hash=sha256:15b00182f472319383252c18d5913b69269590616c947747bc50bf4ac768f410 \
-    --hash=sha256:8519430ad07087d4c997fda3a7918f7cfa27cb58972a8c89c2a0295a1c940e9e
+parso==0.7.1 \
+    --hash=sha256:97218d9159b2520ff45eb78028ba8b50d2bc61dcc062a9682666f2dc4bd331ea \
+    --hash=sha256:caba44724b994a8a5e086460bb212abc5a8bc46951bf4a9a1210745953622eb9
     # via jedi
 pathspec==0.8.1 \
     --hash=sha256:86379d6b86d75816baba717e64b1a3a3469deb93bb76d613c9ce79edc5cb68fd \

requirements/prod.txt

@@ -378,10 +378,12 @@ isodate==0.6.0 \
     #   openapi-core
     #   openapi-schema-validator
     #   python3-saml
-jedi==0.18.0 \
-    --hash=sha256:18456d83f65f400ab0c2d3319e48520420ef43b23a086fdc05dff34132f0fb93 \
-    --hash=sha256:92550a404bad8afed881a137ec9a461fed49eca661414be45059329614ed0707
-    # via ipython
+jedi==0.17.2 \
+    --hash=sha256:86ed7d9b750603e4ba582ea8edc678657fb4007894a12bcf6f4bb97892f31d20 \
+    --hash=sha256:98cc583fa0f2f8304968199b01b6b4b94f469a1f4a74c1560506ca2a211378b5
+    # via
+    #   -r requirements/common.in
+    #   ipython
 jinja2==2.11.3 \
     --hash=sha256:03e47ad063331dd6a3f04a43eddca8a966a26ba0c5b7207a9a9e4e08f1b29419 \
     --hash=sha256:a6d58433de0ae800347cab1fa3043cebbabe8baa9d29e668f1c768cb87a333c6
@@ -600,9 +602,9 @@ orjson==3.5.0 \
 parse==1.19.0 \
     --hash=sha256:9ff82852bcb65d139813e2a5197627a94966245c897796760a3a2a8eb66f020b
     # via openapi-core
-parso==0.8.1 \
-    --hash=sha256:15b00182f472319383252c18d5913b69269590616c947747bc50bf4ac768f410 \
-    --hash=sha256:8519430ad07087d4c997fda3a7918f7cfa27cb58972a8c89c2a0295a1c940e9e
+parso==0.7.1 \
+    --hash=sha256:97218d9159b2520ff45eb78028ba8b50d2bc61dcc062a9682666f2dc4bd331ea \
+    --hash=sha256:caba44724b994a8a5e086460bb212abc5a8bc46951bf4a9a1210745953622eb9
     # via jedi
 pexpect==4.8.0 \
     --hash=sha256:0b48a55dcb3c05f3329815901ea4fc1537514d6ba867a152b581d69ae3710937 \

version.py

@@ -45,4 +45,4 @@ API_FEATURE_LEVEL = 40
 #   historical commits sharing the same major version, in which case a
 #   minor version bump suffices.
 
-PROVISION_VERSION = "131.0"
+PROVISION_VERSION = "131.1"