Adds 'after_deploy' travis hook

Changes:
1. Adds `after_deploy` hook in travis.yml file
2. Adds `.ci/after_deploy.sh` script to trigger metadata calculation

Closes #89

.ci/after_deploy.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+set -e
+
+# This file is required, because for some reason
+# travis deploys do not trigger metadata calculation.
+# See: https://github.com/sobolevn/git-secret/issues/89
+
+# This file is only called after successful deploy.
+
+# We need to execute custom call to the Bintray API:
+curl -X POST \
+  --user "sobolevn:$BINTRAY_API_KEY" \
+  -H "X-GPG-PASSPHRASE: $BINTRAY_GPG_PASS" \
+  "https://api.bintray.com/calc_metadata/sobolevn/$GITSECRET_DIST"

.travis.yml

@@ -71,6 +71,9 @@ deploy:
     key: "$BINTRAY_API_KEY"
     passphrase: "$BINTRAY_GPG_PASS"
 
+after_deploy:
+  - chmod +x ".ci/after_deploy.sh" && ".ci/after_deploy.sh"
+
 notifications:
   email:
     on_success: never