Stopify 0.7.4

- Some dependabot updates.
- Babel parsing exceptions now handled more gracefully.

In the past, I've simultaneously bumped the versions of all the Stopify
packages. This time, I've only bumped @stopify/stopify to 0.7.4, and
all its dependencies remain at 0.7.3.

However, I am really confused about the semantics of yarn.lock.
We have a shared yarn.lock for all Stopify packages. Dependabot pushed
some updates to this file which are part of this release:

- 070d004
- 824da70
- 3ac8225
- 9edbf93
- f1f8dda

However, since it is a shared yarn.lock, I can't easily tell which of these
dependencies belong to which project. Moreover, they are mostly transitive
dependencies that we have never directly imported! So, do I need to think
more carefully and potentially publish new versions of the other packages?
Or, do I not need to think about this at all?

stopify/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@stopify/stopify",
-  "version": "0.7.3",
+  "version": "0.7.4",
   "description": "Stopify makes JavaScript a better target language for high-level languages and web-based programming tools",
   "main": "dist/src/index.js",
   "typings": "dist/src/index",