Fix warnings + update CI

This patch was authored and released by @tanner0101.

Fix Xcode 12 beta 3 warnings and add additional test cases to CI (#117).

Support parameter status messages in query / simpleQuery

This patch was authored and released by @tanner0101.

Adds support for parameter status (S) messages in query and simpleQuery calls (#116, fixes #115).

Add support for VARCHAR[]

This patch was authored and released by @tanner0101.

Adds support for CHARACTER VARYING[] a.k.a VARCHAR[] (#114, fixes #113).

Support remote close

This patch was authored and released by @tanner0101.

Adds support for recognizing a remote close as calling close() (fixes #107, #110)

RawRepresentable + PostgresData

This patch was authored and released by @tanner0101.

Add default PostgresDataConvertible conformance to RawRepresentable where the raw value is postgres convertible (#105, vapor/postgres-kit#179).

Too many binds error

This patch was authored and released by @tanner0101.

Throw an error if too many binds (>= Int16.max) are sent in a parameterized query (#103, fixes #102).

PostgresNIO 1.0.0

Docs:
https://github.com/vapor/postgres-nio/blob/master/README.md

More information on Vapor 4 official release:
https://forums.swift.org/t/vapor-4-official-release-begins/34802

Add query metadata

This patch was authored and released by @tanner0101.

Adds new API for accessing query metadata via conn.query (fixes #93).

conn.query("...", onMetadata: { metadata in 
    print(metadata.rows) // Int?
}) { row in 
    print(row) // PostgresRow
}.wait()

This is a breaking change since conn.query now returns PostgresQueryResult instead of [PostgresRow]. However, PostgresQueryResult conforms to Collection so most code should be unaffected.

let result = try conn.query("...").wait()
for row in result {
    print(row) // PostgresRow
}
print(result.metadata) // PostgresQueryMetadata
print(result.rows) // [PostgresRow]

Update to Metrics 2.0

This patch was authored and released by @tanner0101.

Updates to SwiftMetrics 2.0 which adds a new case the TimeUnit enum (#88, fixes #87)

Send terminate message on close

This patch was authored and released by @tanner0101.

A postgres terminate (X) message is now sent before the connection closes (#86, fixes #84).