Change error message nullable

Author: konifar

library/build.gradle

@@ -4,7 +4,7 @@ apply plugin: 'com.github.dcendents.android-maven'
 
 def versionMajor = 0
 def versionMinor = 2
-def versionPatch = 0
+def versionPatch = 1
 
 group = 'co.kyash'
 version = "$versionMajor.$versionMinor.$versionPatch"

library/src/main/java/co/kyash/vtl/ValidatableTextInputLayout.kt

@@ -233,6 +233,8 @@ class ValidatableTextInputLayout @JvmOverloads constructor(
                 isErrorEnabled = true
                 triggerAfterValidation = false
             }
+        } else {
+            clearErrorMessage()
         }
     }
 

library/src/main/java/co/kyash/vtl/validators/VtlValidator.kt

@@ -21,6 +21,6 @@ interface VtlValidator {
     /**
      * @return errorMessage
      */
-    fun getErrorMessage(): String
+    fun getErrorMessage(): String?
 
 }