bump pydantic-pkgr to 0.3.7

archivebox/vendor/pydantic-pkgr

@@ -1 +1 @@
-Subproject commit a7a3bc43cc2b73bfb23a92c6625510f5f3c3531f
+Subproject commit 4f9486ab86a65f83ad1bfd94320795b8e09871aa

pyproject.toml

@@ -77,7 +77,7 @@ dependencies = [
     ############# VENDORED LIBS ######################
     # these can be safely omitted when installation subsystem does not provide these as packages (e.g. apt/debian)
     # archivebox will automatically load fallback vendored copies bundled via archivebox/vendor/__init__.py
-    "pydantic-pkgr>=0.3.6",
+    "pydantic-pkgr>=0.3.7",
     "atomicwrites==1.4.1",
     "pocket@git+https://github.com/tapanpandita/[email protected]",
     "django-taggit==1.3.0",