style might be undefined at this point (#4155)

style might be undefined at this point and `Object.keys(style)` would
throw an exception

## Summary
I use a third party library and after upgrading to reanimated 3.0.0 I
get the exception at line 123.

## Test plan
I don't have a simple test case but checking that style is defined does
not hurt

src/createAnimatedComponent.tsx

@@ -120,6 +120,9 @@ function isInlineStyleTransform(transform: any): boolean {
 }
 
 function hasInlineStyles(style: StyleProps): boolean {
+  if (!style) {
+    return false;
+  }
   return Object.keys(style).some((key) => {
     const styleValue = style[key];
     return (