I created a .lottie animation using a third party tool and I tried to render it using lottie-ios. Unfortunately, it logged an error and didn't display the file.

However, my animation was rendering just fine in the browser. After some digging, it turns out that the the trim shape dictionary decoder requires it to have a type specified. The JavaScript implementation (and probably others) doesn't require it and sets default value when not found:
https://github.com/LottieFiles/lottie-js/blob/a1bc6c5668323161a08159a2e040ff0cf14ab46c/src/shapes/trim-shape.ts#L40

In this PR, I set default trim type to individual. Similar to the JavaScript implementation.