Add JSONB version to PostgreSQLJSONCustomConvertible

[Sorix]

Information

Fix bug when user tries to save JSONB (most time it shows when trying to save an array) and receive an error: unsupported jsonb version number 123. PostgreSQL requires JSONB version number in a first byte.

https://doxygen.postgresql.org/jsonb_8c_source.html#l00104:

jsonb type recv function
The type is sent as text in binary mode, so this is almost the same as the input function, but it's prefixed with a version number so we can change the binary format sent in future if necessary. For now, only version 1 is supported.

Tests

Current code (before PR) is not working, you can see the error in updated test at CircleCI.
Updated test is located in PR vapor/fluent-postgres-driver#58.

Fixes

That commit fixes next issues:

• Fix jsonb write fail fluent-postgres-driver#38
• Fix unsupported jsonb version number 123 fluent-postgres-driver#48

[tanner0101]

awesome, thanks!

[penny-coin]

Hey @Sorix, you just merged a pull request, have a coin!

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