Add Concurrency extensions for SQLKit. Not much needed here! (#140)

Sources/SQLKit/Concurrency/SQLDatabase+Concurrency.swift

@@ -0,0 +1,11 @@
+#if compiler(>=5.5) && canImport(_Concurrency)
+import NIOCore
+
+@available(macOS 12, iOS 15, watchOS 8, tvOS 15, *)
+public extension SQLDatabase {
+    func execute(sql query: SQLExpression, _ onRow: @escaping (SQLRow) -> ()) async throws -> Void {
+        try await self.execute(sql: query, onRow).get()
+    }
+}
+
+#endif

Sources/SQLKit/Concurrency/SQLQueryBuilder+Concurrency.swift

@@ -0,0 +1,11 @@
+#if compiler(>=5.5) && canImport(_Concurrency)
+import NIOCore
+
+@available(macOS 12, iOS 15, watchOS 8, tvOS 15, *)
+public extension SQLQueryBuilder {
+    func run() async throws -> Void {
+        return try await self.run().get()
+    }
+}
+
+#endif

Sources/SQLKit/Concurrency/SQLQueryFetcher+Concurrency.swift

@@ -0,0 +1,31 @@
+#if compiler(>=5.5) && canImport(_Concurrency)
+import NIOCore
+
+@available(macOS 12, iOS 15, watchOS 8, tvOS 15, *)
+public extension SQLQueryFetcher {
+    func first<D>(decoding: D.Type) async throws -> D? where D: Decodable {
+        return try await self.first(decoding: D.self).get()
+    }
+
+    func first() async throws -> SQLRow? {
+        return try await self.first().get()
+    }
+
+    func all<D>(decoding: D.Type) async throws -> [D] where D: Decodable {
+        return try await self.all(decoding: D.self).get()
+    }
+
+    func all() async throws -> [SQLRow] {
+        return try await self.all().get()
+    }
+
+    func run<D>(decoding: D.Type, _ handler: @escaping (Result<D, Error>) -> ()) async throws -> Void where D: Decodable {
+        return try await self.run(decoding: D.self, handler).get()
+    }
+
+    func run(_ handler: @escaping (SQLRow) -> ()) async throws -> Void {
+        return try await self.run(handler).get()
+    }
+}
+
+#endif