Make Postgres Encodable public

[fabianfett]

Motivation

To finally land async/await support we still need PostgresEncodable to be public

Changes

• make properties on PostgresEncodable static again
  • make var psqlType: PostgresDataType static
  • make var psqlFormat: PostgresFormat static
  • The reason for this change is fairly simple: We needed the behavior on an instance of an object to allow PostgresData to be PostgresEncodable. However we encode PostgresData directly into PostgresBindings today. For this reason we can make the properties static again.
  • the properties are still prefixed psql... Sadly we can't use postgres here as this would collide with the PostgresDataConvertible protocol
• Rename protocol PostgresArrayElement to PostgresArrayEncodable
• Make PostgresEncodable and PostgresArrayEncodable public

Result

One final PR is needed to make async queries public.

[codecov-commenter]

Codecov Report

Merging #248 (9375a1a) into main (136cf4c) will increase coverage by 4.04%.
The diff coverage is 71.87%.

❗ Current head 9375a1a differs from pull request most recent head 24b750f. Consider uploading reports for the commit 24b750f to get more accurate results

@@            Coverage Diff             @@
##             main     #248      +/-   ##
==========================================
+ Coverage   39.72%   43.77%   +4.04%     
==========================================
  Files         115      115              
  Lines        9505     9506       +1     
==========================================
+ Hits         3776     4161     +385     
+ Misses       5729     5345     -384     

Flag	Coverage Δ
unittests	43.77% <71.87%> (+4.04%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...s/PostgresNIO/New/Extensions/ByteBuffer+PSQL.swift	100.00% <ø> (ø)
Sources/PostgresNIO/New/PostgresCodable.swift	91.66% <ø> (ø)
...s/PostgresNIO/New/Data/Bytes+PostgresCodable.swift	64.70% <33.33%> (-8.83%)	⬇️
...es/PostgresNIO/New/Data/Date+PostgresCodable.swift	89.28% <50.00%> (ø)
...PostgresNIO/New/Data/Decimal+PostgresCodable.swift	74.19% <50.00%> (+6.45%)	⬆️
...s/PostgresNIO/New/Data/Float+PostgresCodable.swift	76.66% <50.00%> (+3.33%)	⬆️
...IO/New/Data/RawRepresentable+PostgresCodable.swift	82.35% <50.00%> (ø)
...ces/PostgresNIO/New/Data/Int+PostgresCodable.swift	36.60% <64.70%> (+11.11%)	⬆️
...s/PostgresNIO/New/Data/Array+PostgresCodable.swift	93.25% <90.00%> (-0.43%)	⬇️
...es/PostgresNIO/New/Data/Bool+PostgresCodable.swift	95.34% <100.00%> (+4.65%)	⬆️
... and 35 more

[gwynne]

Love it!