Sample appears to have compile errors on deploy

[leetworx]

Hi there,
I believe I've captured the sample accurately and I'm trying to run it within my existing firebase project before I go and try to create my own functions (new to functions/typescript) - unfortunately, I run into the following message on deploy:

src/index.ts:16:18 - error TS2532: Object is possibly 'undefined'.

16         body: `${puppy.name} is ready for adoption`,
                    ~~~~~

src/index.ts:34:12 - error TS2532: Object is possibly 'undefined'.

34       .doc(order.seller)
              ~~~~~

src/index.ts:43:29 - error TS2532: Object is possibly 'undefined'.

43         body: `you sold a ${order.product} for ${order.total}`,
                               ~~~~~

src/index.ts:43:50 - error TS2532: Object is possibly 'undefined'.

43         body: `you sold a ${order.product} for ${order.total}`,

[leetworx]

FWIW, I think this might just be due to versioning of dependencies/toolchain etc...
I was able to work around it by installing typescript beta:

npm install typescript@beta

And replace object.field references with object?.field so as to satisfy the check.