Update step.sh

Added support for ´autoremove´ param that automatically removes the oldest build before uploading a new one to prevent reaching your account limits.

step.sh

@@ -56,6 +56,7 @@ echo "* app_id: ${app_id}"
 echo "* version_name: ${version_name}"
 echo "* notes: ${notes}"
 echo "* notify: ${notify}"
+echo "* autoremove: ${autoremove}"
 echo "* os: ${os}"
 echo "* tags: ${tags}"
 echo "* apk_path: ${apk_path}"
@@ -79,6 +80,7 @@ curl_cmd="$curl_cmd -F \"app=${app_id}\""
 curl_cmd="$curl_cmd -F \"versionName=${version_name}\""
 curl_cmd="$curl_cmd -F \"notes=${notes}\""
 curl_cmd="$curl_cmd -F \"notify=${notify}\""
+curl_cmd="$curl_cmd -F \"autoremove=${autoremove}\""
 curl_cmd="$curl_cmd -F \"os=android\""
 curl_cmd="$curl_cmd -F \"deployer=bitrise\""
 curl_cmd="$curl_cmd -F \"tags=${tags}\""