add support for decoding integers from NUMERIC data

Author: tanner0101

Sources/PostgreSQL/Data/PostgreSQLData+FixedWidthInteger.swift

@@ -25,6 +25,11 @@ extension FixedWidthInteger {
                     throw PostgreSQLError.decode(self, from: data)
                 }
                 i = value.as(Int64.self, default: 0).bigEndian.cast(to: Self.self)
+            case .numeric:
+                guard let int = try Self(String.convertFromPostgreSQLData(data)) else {
+                    throw PostgreSQLError.decode(Int.self, from: data)
+                }
+                i = int
             default: throw PostgreSQLError.decode(self, from: data)
             }
             guard let value = i else {

Tests/PostgreSQLTests/PostgreSQLConnectionTests.swift

@@ -236,7 +236,7 @@ class PostgreSQLConnectionTests: XCTestCase {
 
     func testURLParsing() throws {
         let databaseURL = "postgres://username:password@localhost:5432/database"
-        let config = try PostgreSQLDatabaseConfig(url: databaseURL)!
+        let config = PostgreSQLDatabaseConfig(url: databaseURL)!
         XCTAssertEqual("\(config.serverAddress)", "ServerAddress(storage: PostgreSQL.PostgreSQLConnection.ServerAddress.Storage.tcp(hostname: \"localhost\", port: 5432))")
         XCTAssertEqual(config.username, "username")
         XCTAssertEqual(config.password, "password")