dry-validation: :form input_processor no longer coerces strings to int when using Rails params?

This code used to work (in version 0.9.x) but now fails in 0.10.2:

describe "type coersion (from rails params)" do
  let (:params)    { ActionController::Parameters.new({ age: '18' }) }
  let (:validated) { schema.call(params) }
  let (:schema) do
    Dry::Validation.Schema do
      configure do
        config.input_processor = :form
        config.hash_type       = :symbolized
      end
      required(:age).filled(:int?)
    end
  end
  it "coerces to integer" do
    expect(validated.output[:age]).to eq 18
  end
  it "is valid" do
    expect(validated.success?).to eq true
  end
end

Plain hashes still work, though:

describe "type coersion (from hash)" do
  let (:params)    { { age: '18' } }
  let (:validated) { schema.call(params) }
  let (:schema) do
    Dry::Validation.Schema do
      configure do
        config.input_processor = :form
        config.hash_type       = :symbolized
      end
      required(:age).filled(:int?)
    end
  end
  it "coerces to integer" do
    expect(validated.output[:age]).to eq 18
  end
  it "is valid" do
    expect(validated.success?).to eq true
  end
end