add --fingerprint flag for reading keys

Author: jokeyrhyme

lib/gpg.js

@@ -49,10 +49,11 @@ async function getUsernames(keyId /* : string */) {
 
 async function listKnownPublicKeys() {
   const { all, stdout } = await execa(await exe(), [
-    '--list-public-keys',
+    '--list-keys',
+    '--fingerprint',
     '--textmode',
   ]);
-  debug('listKnownPublicKeys(): gpg --list-public-keys --textmode\n%s', all);
+  debug('listKnownPublicKeys(): gpg --list-keys --fingerprint --textmode\n%s', all);
 
   return stdout
     .split('\n\n')