Unable to run for web platform on Appflow

The default Trapeze script doesn't run if the CI_PLATFORM is 'web'. I removed this conditional logic because I want to run some JSON patching even for Javascript builds. But then it doesn't work if I pass in the platform "web" to the trapeze command-line. So, I removed that flag. But now it appears trapeze attempts to use Gradle on iOS builds, which at least in Appflow is not present. What's the correct way to set this up?

My current Trapeze config yaml (appflow.yml):

```
vars:
CI_BUILD_NUMBER:
default: 1

platforms:
ios:
buildNumber: $CI_BUILD_NUMBER
android:
versionCode: $CI_BUILD_NUMBER
project:
json:
- file: src/metadata.json
set:
liveBuild: $CI_BUILD_NUMBER
```

And my package.json build script:

```
"appflow:build": "CI_BUILD_NUMBER=$(($CI_BUILD_NUMBER + 1143)); npx trapeze run appflow.yml -y && npm run build",
```