Support text based placeholders

tests/SlackBuilder/PackageSpec.hs

@@ -6,7 +6,6 @@ module SlackBuilder.PackageSpec
     ( spec
     ) where 
 
-import Data.List.NonEmpty (NonEmpty(..))
 import SlackBuilder.Package
 import Test.Hspec (Spec, describe, it, shouldBe)
 import Text.URI.QQ (uri)
@@ -15,17 +14,13 @@ spec :: Spec
 spec = do
     describe "renderDownloadWithVersion" $ do
         it "renders text as URL" $
-            let given = DownloadTemplate
-                    $ pure
-                    $ StaticPlaceholder "https://example.com"
+            let given = DownloadTemplate "https://example.com"
                 actual = renderDownloadWithVersion given "1.2"
                 expected = Just [uri|https://example.com|]
              in actual `shouldBe` expected
 
         it "renders the components in order" $
-            let given = DownloadTemplate
-                    $ StaticPlaceholder "https://example.com/"
-                    :| [VersionPlaceholder, StaticPlaceholder "/segment"]
+            let given = DownloadTemplate "https://example.com/{version}/segment"
                 actual = renderDownloadWithVersion given "1.2"
                 expected = Just [uri|https://example.com/1.2/segment|]
              in actual `shouldBe` expected