Version 1.12.0-dev.5.8

Fix another error in merge of e3963b88d1a58c2823d57d5cae13bf6d6eec9e3c to
version 1.12.0-dev.5.6
diff --git a/DEPS b/DEPS
index 80d6294..9f0e802 100644
--- a/DEPS
+++ b/DEPS
@@ -78,7 +78,7 @@
   "oauth2_rev": "@1bff41f4d54505c36f2d1a001b83b8b745c452f5",
   "observe_rev": "@eee2b8ec34236fa46982575fbccff84f61202ac6",
   "observatory_pub_packages_rev": "@cdc4b3d4c15b9c0c8e7702dff127b440afbb7485",
-  "package_config_rev": "@0.1.3",
+  "package_config_tag": "@0.1.3",
   "path_tag": "@1.3.6",
   "petitparser_rev" : "@37878",
   "ply_rev": "@604b32590ffad5cbb82e4afef1d305512d06ae93",
diff --git a/tools/VERSION b/tools/VERSION
index f6c8a6b..9524960 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -28,4 +28,4 @@
 MINOR 12
 PATCH 0
 PRERELEASE 5
-PRERELEASE_PATCH 7
+PRERELEASE_PATCH 8