Add required prop to select

src/components.d.ts

@@ -766,6 +766,10 @@ export namespace Components {
           * The select's placeholder text.
          */
         "placeholder": string;
+        /**
+          * The select's required attribute.
+         */
+        "required": boolean;
         /**
           * The select's size.
          */
@@ -2132,6 +2136,10 @@ declare namespace LocalJSX {
           * The select's placeholder text.
          */
         "placeholder"?: string;
+        /**
+          * The select's required attribute.
+         */
+        "required"?: boolean;
         /**
           * The select's size.
          */

src/components/select/select.tsx

@@ -74,6 +74,9 @@ export class Select {
   /** The select's label. */
   @Prop() label = '';
 
+  /** The select's required attribute. */
+  @Prop() required: boolean;
+
   /** Set to true to indicate that the user input is valid. */
   @Prop() valid = false;
 
@@ -350,6 +353,7 @@ export class Select {
             size={this.size}
             valid={this.valid}
             invalid={this.invalid}
+            required={this.required}
             aria-labelledby={this.labelId}
             aria-describedby={this.helpTextId}
             onSlFocus={this.handleFocus}