feat: let "cancel" prop have a default value

This lets you cancel all animations until { cancel: false, default: true } is merged.

Author: aleclarson

packages/core/src/SpringValue.ts

@@ -502,6 +502,15 @@ export class SpringValue<T = any> extends FrameValue<T> {
   protected _update(props: SpringUpdate<T>, isLoop?: boolean): AsyncResult<T> {
     const defaultProps = this._defaultProps
 
+    // Set the default `cancel` prop first, because it prevents other default
+    // props in this update from being cached.
+    if (props.default && !is.und(props.cancel)) {
+      defaultProps.cancel = props.cancel
+    }
+    // The default `cancel` prop overrides all updates.
+    else if (defaultProps.cancel) {
+      props.cancel = true
+    }
     // The default `pause` prop overrides all updates.
     if (defaultProps.pause) {
       props.pause = true

packages/core/src/helpers.ts

@@ -51,6 +51,7 @@ export const getProps = <T, Arg = never>(
 /** These props can have default values */
 export const DEFAULT_PROPS = [
   'pause',
+  'cancel',
   'config',
   'immediate',
   'onDelayEnd',