Fix Webpack compatibility

[MattiasBuelens]

Webpack seems to always select the UMD version using a require condition, whereas the ESM version is much more suitable for such bundlers.

I also revisited the fix from #95 to be more robust. We will now specifically look for the Conviva.Constants API to decide whether to use the default or namespace import when loading the Conviva SDK. This should be more robust.

[changeset-bot]

🦋 Changeset detected

Latest commit: 6e7da23

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 7 packages

Name	Type
@theoplayer/adscript-connector-web	Patch
@theoplayer/comscore-connector-web	Patch
@theoplayer/conviva-connector-web	Patch
@theoplayer/nielsen-connector-web	Patch
@theoplayer/yospace-connector-web	Patch
@theoplayer/gemius-connector-web	Patch
@theoplayer/cmcd-connector-web	Patch

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[tvanlaerhoven]

When importing through @theoplayer/react-native-analytics-conviva, and bundling with Webpack, I see it now takes the ESM module, but it still fails with:

conviva-connector.esm.js:2 Uncaught ReferenceError: exports is not defined
    at eval (conviva-connector.esm.js:2:23)
    at ./node_modules/@theoplayer/conviva-connector-web/dist/conviva-connector.esm.js (bundle.web.js:2162:1)
    at __webpack_require__ (bundle.web.js:6612:32)
    at fn (bundle.web.js:6819:21)
    at eval (ConvivaConnectorAdapter.web.js:1:651)
    at ./node_modules/@theoplayer/react-native-analytics-conviva/lib/module/internal/ConvivaConnectorAdapter.web.js (bundle.web.js:2206:1)
    at __webpack_require__ (bundle.web.js:6612:32)
    at fn (bundle.web.js:6819:21)
    at eval (ConvivaConnector.js:1:618)
    at ./node_modules/@theoplayer/react-native-analytics-conviva/lib/module/api/ConvivaConnector.js (bundle.web.js:2173:1)