chore(build): source Bintray credentials before deploy

.travis.yml

@@ -21,6 +21,7 @@ script:
   # Tricks to avoid unnecessary cache updates
   - find $HOME/.sbt -name "*.lock" | xargs rm
   - find $HOME/.ivy2 -name "ivydata-*.properties" | xargs rm
+  - sh "$TRAVIS_BUILD_DIR/scripts/travis-credentials.sh"
 
 deploy:
   provider: script

scripts/travis-credentials.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+mkdir ~/.bintray/
+FILE=$HOME/.bintray/.credentials
+cat <<EOF >$FILE
+    realm = Bintray API Realm
+    host = api.bintray.com
+    user = $BINTRAY_USER
+    password = $BINTRAY_API_KEY
+EOF
+echo $BINTRAY_USER
+echo "Created ~/.bintray/.credentials file: Here it is: "
+ls -la $FILE