Permit integers as keys

[benlinton]

Given:

en:
  steps:
    1: "First step"
    2: "Second step"

I'm able to successfully use rails built in translations = t("steps.1").

But text_helpers gem fails = text("steps.1") to find the translation; unless I change 1 to one (which makes it more difficult to iterate over).

[soulcutter]

I poked at this a bit and am not sure how this works in rails, but not in text_helpers. A workaround is to use keys like this:

en:
  steps:
    "1": "First step"
    "2": "second step"