Errors in Safari

Using inside a React app, I can fix these errors by simply removing this library. It's also only present in Safari (`10.1`). Using TypeScript with `es2015` target in-case that's relevant.

Can't share the code but can try to create a small repro if it'd help/isn't immediately obvious.

Caught by my router upon entering page with this library in use: `ReferenceError: Can't find variable _catchAllSymbol`, leads to `match` function. (Can't seem to click into it... ugh Safari.)

Thrown by React: `TypeError: null is not an object (evaluating 'node[internalInstanceKey]')` at `ReactDOMComponentTree.js:113`

As I said, only this library and only Safari. Help appreciated, cheers!