sqlfmt incorrect reformatted JSON access path, breaking all accesses.

[jlucas91]

Describe the bug
We store json blobs within columns throughout our data pipeline. We'll then parse the JSON blob's field/values into their own columns in later stages. sqlfmt incorrectly lowercased the access path when retrieving data from the JSON blob. This lead to all accesses silently failing.

To Reproduce
Given the original snippet:

with test as (
    select
        cast(json:source_payload:orderId as varchar) as order_id,
    from source
)
select *
from test

sqlfmt formats to:

with
    test as (
        select cast(json:source_payload:orderid as varchar) as order_id, from source
    )
select *
from test

Note that orderId has become orderid. This is not a safe fix.

Expected behavior
Only safe formatting fixes should be performed.

Actual behavior
The json access path is broken.

Additional context
sqlfmt, version 0.21.2

[tconbeer]

This duplicates #269

Please see that issue and the related note about the "help wanted" tag