Puppet Lint breaks STDIO transport on error

[glennsarti]

Initially raised in puppetlabs/puppet-vscode#436

If puppet-lint experiences a catastrophic error it polutes STDOUT with Whoops! It looks like puppet-lint has encountered an error that it doesn't\nknow how to handle. Please open an issue at https: "//github.com/rodjek/puppet-lint\nand paste the foll… which causes the LSP STDIO transport to fail in the client.

All STDIO output from puppet-lint should be suppressed