Support for Flex device

What's Changed

• Bump @grpc/grpc-js from 1.10.6 to 1.10.7 by @dependabot in #425
• Bump @ledgerhq/hw-transport from 6.30.5 to 6.30.6 by @dependabot in #424
• Bump @types/pngjs from 6.0.4 to 6.0.5 by @dependabot in #427
• Bump @types/dockerode from 3.3.28 to 3.3.29 by @dependabot in #426
• Bump @ledgerhq/hw-transport-http from 6.29.5 to 6.29.6 by @dependabot in #428
• Bump @grpc/grpc-js from 1.10.7 to 1.10.9 by @dependabot in #438
• Bump ws from 7.5.9 to 7.5.10 by @dependabot in #441
• Bump braces from 3.0.2 to 3.0.3 by @dependabot in #440
• Bump rimraf from 5.0.5 to 5.0.7 by @dependabot in #432
• Bump axios-retry from 4.1.0 to 4.4.0 by @dependabot in #437
• Bump @grpc/proto-loader from 0.7.12 to 0.7.13 by @dependabot in #429
• Bump @ledgerhq/hw-transport from 6.30.6 to 6.31.0 by @dependabot in #446
• Bump @ledgerhq/hw-transport-http from 6.29.6 to 6.30.0 by @dependabot in #445
• Bump @zondax/ledger-substrate from 0.43.0 to 0.44.2 by @dependabot in #444
• Bump eslint-plugin-promise from 6.1.1 to 6.2.0 by @dependabot in #443
• Support for Flex device by @ftheirs in #462

Full Changelog: v0.49.0...v0.50.0