Add manifests to published releases, to simplify rollback

With this in place, rollback just requires copying the manifests
from the desired target release to the latest-release tag, rather
than rebuilding & deploying an old release from scratch.

Author: pimterry

.travis.yml

@@ -52,7 +52,9 @@ jobs:
             secure: 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
           file_glob: true
           tag_name: $TRAVIS_TAG
-          file: build/dist/v*/*
+          file:
+            - build/dist/v*/*
+            - build/dist/latest-manifest/*
           skip_cleanup: true
           on:
             repo: httptoolkit/httptoolkit-server