make textarea rows configurable (#3042)

* make textarea rows configurable

* add comments

* better defaults

sdk/package/lib/test/inputSpecBuilder.test.ts

@@ -140,6 +140,8 @@ describe("values", () => {
       warning: null,
       minLength: null,
       maxLength: null,
+      minRows: 3,
+      maxRows: 6,
       placeholder: null,
     }).build({} as any)
     const validator = value.validator
@@ -452,6 +454,8 @@ describe("values", () => {
         warning: null,
         minLength: null,
         maxLength: null,
+        minRows: 3,
+        maxRows: 6,
         placeholder: null,
       })).build({} as any)
       const validator = value.validator

sdk/package/scripts/oldSpecToBuilder.ts

@@ -81,8 +81,10 @@ const {InputSpec, List, Value, Variants} = sdk
               required: !(value.nullable || false),
               default: value.default,
               placeholder: value.placeholder || null,
-              maxLength: null,
               minLength: null,
+              maxLength: null,
+              minRows: 3,
+              maxRows: 6,
             },
             null,
             2,