Hashie::Mash#load no longer accepts Pathname

[albb0920]

Hi

I find passing Pathname to Hashie::Mash.load() has been broken since 3.5.1 (works fine in 3.4.6)

hashie-3.5.1/lib/hashie/mash.rb:114:in `custom_writer': undefined method `to_sym' for #<Pathname:test.yml> (NoMethodError)
Did you mean?  to_s
	from /home/albb0920/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/hashie-3.5.1/lib/hashie/mash.rb:73:in `load'

I believe this is introduced in this commit, as it assumes key respond to #to_sym without using convert_key()
e35e628#diff-167a475bc5a73269819928a9da362073R112

changing this line to "key_as_symbol = convert_key(key).to_sym" will fix it.

Should I submit a pull request?
Thank you

[dblock]

Yes, please.

[dblock]

Fixed in #399.