Adopt apify-client v3.1 and enable brotli compression by default

[vdusek]

Adopt apify-client v3.1 in the SDK and enable brotli compression as the default for all SDK/client ↔ platform communication.

apify-client-python #927 adds HTTP request body compression to the client. Brotli is an optional compression method (extra apify-client[brotli]) that falls back to gzip when it isn't installed. The SDK should bump apify-client to v3.1 and pull in the [brotli] extra so brotli is used by default, with gzip as the fallback.

Related

• apify-client-python#927 (merged)
• apify-client-js#962
• apify-docs#2750
• apify-core#28971
• apify-sdk-python#1031