Add .gitblameignore (#6848)

.gitblameignore

@@ -0,0 +1,28 @@
+# List of revisions that can be ignored with git-blame(1).
+#
+# See `blame.ignoreRevsFile` in git-config(1) to enable it by default, or
+# use it with `--ignore-revs-file` manually with git-blame.
+#
+# To "install" it:
+#
+#   git config --local blame.ignoreRevsFile .gitblameignore
+
+# run black
+703e4b11ba76171eccd3f13e723c47b810ded7ef
+# switched to src layout
+eaa882f3d5340956beb176aa1753e07e3f3f2190
+# pre-commit run pyupgrade --all-files
+a91fe1feddbded535a4322ab854429e3a3961fb4
+# move node base classes from main to nodes
+afc607cfd81458d4e4f3b1f3cf8cc931b933907e
+# [?] split most fixture related code into own plugin
+8c49561470708761f7321504f5e8343811be87ac
+# run pyupgrade
+9aacb4635e81edd6ecf281d4f6c0cfc8e94ab301
+# run blacken-docs
+5f95dce95602921a70bfbc7d8de2f7712c5e4505
+# ran pyupgrade-docs again
+75d0b899bbb56d6849e9d69d83a9426ed3f43f8b
+
+# move argument parser to own file
+c9df77cbd6a365dcb73c39618e4842711817e871