Fix error -- cast from Array(String) to String

[akadusei]

Fixes #884

You can now instantiate Avram::Params passing a hash with array values or string values or a mixture of both.

[jwoertink]

Thanks for taking this on. One thing I'd like to see would be a spec that allows me to pass in an array value, and then one with a mixed value. So like...

it "should work" do
  params = Avram::Params.new({"key" => ["val1", "val2"]})
  SomeOperation.create(params) do |o, v|
    v.should_not be_nil
  end
end

it "should also work" do
  params = Avram::Params.new({"key" => ["val1", "val2"], "key2" => "123"})
  SomeOperation.create(params) do |o, v|
    v.should_not be_nil
  end
end

I think having those two test cases, we should be solid enough to know this all works well.

[jwoertink]

oh, interesting! I think this is where I got tripped up before. I didn't think to also do a union of each one. Nice 👍

[jwoertink]

Sweet! I think this looks good.