`require_relative': cannot load such file to_proc.rb since facets 3.2.0

[lgatellier]

Hi,

Since today's facets 3.2.0 release, the hash/to_proc.rb file has been removed, but hash.rb still requires it, thus breaking client applications.

Error stack:

/usr/local/share/gems/gems/facets-3.2.0/lib/core/facets/hash.rb:43:in `require_relative': cannot load such file -- /usr/local/share/gems/gems/facets-3.2.0/lib/core/facets/hash/to_proc.rb (LoadError)
      from /usr/local/share/gems/gems/facets-3.2.0/lib/core/facets/hash.rb:43:in `<top (required)>'
      from <internal:/usr/share/rubygems/rubygems/core_ext/kernel_require.rb>:85:in `require'