no exception if file doesn't exist

[bastelfreak]

Describe the Bug

I'm currently writing a Puppet function that relies on Hocon. I noticed that Hocon can parse files but it will return an empty hash if the provided file doesn't exist:

root@puppet ~ # /opt/puppetlabs/puppet/bin/irb
irb(main):001:0> require 'hocon'
=> true
irb(main):002:0> Hocon.load('/tmp/foo.conwf')
/opt/puppetlabs/puppet/lib/ruby/vendor_gems/gems/hocon-1.4.0/lib/hocon.rb:23:in `load': Unrecognized file extension '.conwf' and no value provided for :syntax option (Hocon::ConfigError::ConfigParseError)
	from (irb):2:in `<main>'
	from /opt/puppetlabs/puppet/lib/ruby/gems/3.2.0/gems/irb-1.6.2/exe/irb:11:in `<top (required)>'
	from /opt/puppetlabs/puppet/bin/irb:25:in `load'
	from /opt/puppetlabs/puppet/bin/irb:25:in `<main>'
irb(main):003:0> Hocon.load('/tmp/foow.conf')
=> {}
irb(main):004:0>
root@puppet ~ # ls -la /tmp/foow.conf
ls: cannot access '/tmp/foow.conf': No such file or directory
root@puppet ~ #

Expected Behavior

The Hocon gem should raise an exception if a file is not found / is not readable. Now you cannot determine if the file doesn't exist or contains an empty hash.

Steps to Reproduce

• require 'hocon'
• Hocon.load('/non/existing/path')

Environment

*** LOCAL GEMS ***

hocon (1.4.0)
    Authors: Chris Price, Wayne Warren, Preben Ingvaldsen, Joe
    Pinsonault, Kevin Corcoran, Jane Lu
    Homepage: https://github.com/puppetlabs/ruby-hocon
    License: Apache License, v2
    Installed at: /opt/puppetlabs/puppet/lib/ruby/vendor_gems

    HOCON Config Library
root@puppet ~ #

Additional Context

Add any other context about the problem here.