Add a codec for BigInteger

[timve]

I would like to add support for the BigInteger type to the codecs.

In our project we use r2dbc in combination with code generated by jooq (based on the sql schema). When a Numeric column has a scale of 0 (the default) and has a sufficiently high precision, the generated java type for the column is a BigInteger.

I would like to be able to get the column value as this type from r2dbc by adding a codec similar to the BigDecimalCodec.

I have currently written this codec in our own project but would like to add them to r2dbc-postgresql.

[mp911de]

Sounds like a good fit for the driver. Do you want to submit a pull request for the codec along with some tests?

[timve]

Thank you for the quick response, I have opened pull request #235 to add the codec to the driver.