Update release instructions.

* GPG 2.1 requires use of short format key names
* Gradle 5.6.1 has removed the `--recompile-scripts` flag.

Fixes #9.

Author: Capstan

dorelease.sh

@@ -3,11 +3,12 @@
 # Release instructions
 # 1. Follow the gpg setup instructions: http://central.sonatype.org/pages/working-with-pgp-signatures.html
 #   a. gpg2 --export-secret-keys > ~/.gnupg/secring.gpg
+#   b. gpg2 --list-keys --keyid-format short
 # 2. In ~/.gradle add:
 # sonatypeUsername=your sonatype user name
 # sonatypePassword=password in vault for oss sonatype<ensure newline>
 #
-# signing.keyId=generated key
+# signing.keyId=generated key in short format
 # signing.password=password for gpg key
 # signing.secretKeyRingFile=/Users/username/.gnupg/secring.gpg
 #
@@ -16,5 +17,5 @@
 # 5. Login as sonatypeUsername
 # 6. Follow the instructions here: http://central.sonatype.org/pages/releasing-the-deployment.html
 
-./gradlew --recompile-scripts clean test uploadArchives
+./gradlew clean test uploadArchives