[FIX] Update maintainer-tools, fix TravisCI builds

.pre-commit-config.yaml

@@ -4,6 +4,8 @@ exclude: |
   # END NOT INSTALLABLE ADDONS
   # Files and folders generated by bots, to avoid loops
   ^setup/|/static/description/index\.html$|
+  # We don't want to mess with tool-generated files
+  .svg$|
   # Maybe reactivate this when all README files include prettier ignore tags?
   ^README\.md$|
   # Library files can have extraneous formatting (even minimized)
@@ -26,7 +28,7 @@ repos:
         language: fail
         files: "\\.rej$"
   - repo: https://github.com/oca/maintainer-tools
-    rev: 1b5c7ad
+    rev: ab1d7f6
     hooks:
       # update the NOT INSTALLABLE ADDONS section above
       - id: oca-update-pre-commit-excluded-addons
@@ -41,7 +43,7 @@ repos:
     rev: 20.8b1
     hooks:
       - id: black
-  - repo: https://github.com/prettier/pre-commit
+  - repo: https://github.com/pre-commit/mirrors-prettier
     rev: v2.1.2
     hooks:
       - id: prettier