Export Input in TypeScript definitions (#953)

* Fixes #947 Input is not exported in TypeScript definitions

* Use react-native TextInputProperties and match type description to docs description

* Add missing methods for Input component

src/index.d.ts

@@ -730,11 +730,96 @@ export interface FormValidationMessageProps extends ViewProperties {
      */
   fontFamily?: string;
 }
+
 export class FormValidationMessage extends React.Component<
   FormValidationMessageProps,
   any
 > {}
 
+export interface InputProps extends TextInputProperties {
+  /**
+     * Styling for Input Component Container (optional)
+     */
+  containerStyle?: StyleProp<ViewStyle>;
+
+  /**
+    * Displays an icon to the left (optional)
+    */
+  leftIcon?: JSX.Element;
+
+  /**
+    * Styling for left Icon Component container
+    */
+  leftIconContainerStyle?: StyleProp<ViewStyle>;
+
+   /**
+    * Displays an icon to the right (optional)
+    */
+  rightIcon?: JSX.Element;
+
+  /**
+    * Styling for the right icon container
+    */
+  rightIconContainerStyle?: StyleProp<ViewStyle>;
+
+  /**
+     * 	Adds styling to input component (optional)
+     */
+  inputStyle?: StyleProp<TextStyle>;
+
+  /**
+     * Adds shaking effect to input component (optional) 
+     */
+  shake?: any;
+
+  /**
+     *  Displays error (optional)
+     */
+  displayError?: boolean
+
+  /**
+     * 	Add styling to error message (optional)
+     */
+  errorStyle?: StyleProp<TextStyle>;
+
+   /**
+     * 	Adds error message (optional)
+     * *
+     * @default 'Error!'
+     */
+  errorMessage?: string
+} 
+
+export class Input extends React.Component<InputProps, any> {
+    /**
+       * Shakes the Input
+       *
+       * eg `this.inputRef.shake()`
+       */
+    shake(): void;
+
+    /**
+       * Calls focus on the Input
+       *
+       * eg `this.inputRef.focus()`
+       */
+    focus(): void;
+
+    /**
+       * Calls blur on the Input
+       *
+       * eg `this.inputRef.blur()`
+       */
+    blur(): void;
+
+    /**
+       * Calls clear on the Input
+       *
+       * eg `this.inputRef.clear()`
+       */
+    clear(): void;
+}
+
 export interface FormInputProps extends TextInputProperties {
   /**
      * TextInput container styling