Update animated-progress.tsx (#1352)

Co-authored-by: Scott Rippey <scottrippey@users.noreply.github.com>

Author: madaxen86

.changeset/bright-crews-bathe.md

@@ -0,0 +1,5 @@
+---
+"spectacle": patch
+---
+
+Ensure "PacMan" animation works in Safari

packages/spectacle/src/components/animated-progress.tsx

@@ -27,6 +27,8 @@ export const PacmanBase = styled.div<PacmanBaseProps>`
   width: ${({ pacmanSize }) => pacmanSize}px;
   transition: left 0.3s ease-in-out 0.2s;
   transform: translate(-50%, -50%);
+  border-radius: 9999px;
+  overflow: hidden;
 `;
 
 const pacmanTopFrames = keyframes`