add string param alias

Author: r-bar

README.md

@@ -19,6 +19,7 @@ Run:
 import duckling
 import duckling/param
 import gleam/dict
+import gleam/dynamic/decode
 import gleam/result
 
 pub fn main() {

src/duckling.gleam

@@ -124,6 +124,8 @@ pub fn with_connection(
 /// import duckling
 /// import duckling/param
 /// import gleam/dict
+/// import gleam/dynamic/decode
+/// import gleam/result
 ///
 /// type User {
 ///   User(

src/duckling/param.gleam

@@ -13,11 +13,16 @@ pub type Params {
 /// Helper for passing no parameters.
 pub const empty = OrderedParams([])
 
-/// Create an INT64 bind parameter value. Alias for int64
+/// Create an INT64 bind parameter value. Alias for [int64](#int64).
 pub fn int(value: Int) -> ParamValue {
   types.Int64Param(value)
 }
 
+/// Create a VARCHAR bind parameter value. Alias for [varchar](#varchar).
+pub fn string(value: String) -> ParamValue {
+  types.VarcharParam(value)
+}
+
 /// Create a VARCHAR bind parameter value
 pub fn varchar(value: String) -> ParamValue {
   types.VarcharParam(value)