fix(local-npm): don't fail if unpublish does not work

It will be quite common that the package being published is not yet in the
local npm registry, so ignore unpublish when it fails.

Author: izaera

support/packages/local-npm/lib/index.js

@@ -94,7 +94,7 @@ function publish(projects) {
 
 		console.log(`       ${pkgId}`);
 
-		run('npm', 'unpublish', pkgId);
+		run('npm', 'unpublish', pkgId, {lenient: true});
 		run('yarn', 'cache', 'clean', pkgId);
 	});
 
@@ -150,6 +150,7 @@ function registrySet(which) {
 
 function run(cmd, ...args) {
 	let options = {
+		lenient: false, // set to true to ignore error return codes
 		shell: true,
 		stdio: 'pipe',
 	};
@@ -171,7 +172,7 @@ function run(cmd, ...args) {
 		process.exit(1);
 	}
 
-	if (result.status !== 0) {
+	if (!options.lenient && result.status !== 0) {
 		if (result.stdout) {
 			console.error(result.stdout.toString());
 			console.error(result.stderr.toString());