Fix Params case handling in the index, sort and where func

This means that you can now do:

```
{{ range where .Site.Pages "Params.MYPARAM" "foo" }}
```

2 files changed, 3 insertions, 3 deletions

diff --git a/langs/config.go b/langs/config.go
index 927f3558f..184223650 100644
--- a/langs/config.go
+++ b/langs/config.go
@@ -171,7 +171,7 @@ func toSortedLanguages(cfg config.Provider, l map[string]interface{}) (Languages
 	i := 0
 
 	for lang, langConf := range l {
-		langsMap, err := cast.ToStringMapE(langConf)
+		langsMap, err := maps.ToStringMapE(langConf)
 
 		if err != nil {
 			return nil, fmt.Errorf("Language config is not a map: %T", langConf)
@@ -192,7 +192,7 @@ func toSortedLanguages(cfg config.Provider, l map[string]interface{}) (Languages
 			case "disabled":
 				language.Disabled = cast.ToBool(v)
 			case "params":
-				m := cast.ToStringMap(v)
+				m := maps.ToStringMap(v)
 				// Needed for case insensitive fetching of params values
 				maps.ToLower(m)
 				for k, vv := range m {
diff --git a/langs/language.go b/langs/language.go
index f71b0255b..67cb3689a 100644
--- a/langs/language.go
+++ b/langs/language.go
@@ -177,7 +177,7 @@ func (l *Language) GetInt(key string) int { return cast.ToInt(l.Get(key)) }
 
 // GetStringMap returns the value associated with the key as a map of interfaces.
 func (l *Language) GetStringMap(key string) map[string]interface{} {
-	return cast.ToStringMap(l.Get(key))
+	return maps.ToStringMap(l.Get(key))
 }
 
 // GetStringMapString returns the value associated with the key as a map of strings.