Next companion major version (v4)

[mifi]

I created this issue to collect any breaking changes that we want to do for the next major:

• streamingUpload true by default (and remove from all docs/examples where it is set to true)

  uppy/packages/@uppy/companion/src/companion.js

  Line 42 in 50cd8c3

  streamingUpload: false,

  50cd8c3
• Remove ProviderCompat.js/wrapLegacyProvider backward compatibility code and default to the new async Provider API

  uppy/packages/@uppy/companion/src/server/provider/index.js

  Line 87 in 313d75b

  if (ProviderClass.version !== 2) ProviderClass = wrapLegacyProvider(ProviderClass)

  a16f34c

• uppy/packages/@uppy/companion/src/standalone/index.js

  Line 85 in d0d117c

  // TODO for the next major version: use instead companion option "metrics": true and remove this code

• Node.js min version v14
• Crash on startup if uploadUrls is not set and if running in production, in order to prevent SSRF enforce usage of uploadUrls #3965 - see also Make uploadUrls recommended #3182
• Configure search providers in the same way (providerOptions) instead of their own searchProviders to avoid confusion.
• add more here ...

[Murderlon]

Companion v4 has been released