Update GRDB to version 7

Author: atdrendel

Package.resolved

@@ -20,7 +20,7 @@ let package = Package(
         ),
         .package(
             url: "https://github.com/groue/GRDB.swift.git",
-            from: "6.29.3"
+            from: "7.4.1"
         ),
         .package(
             url: "https://github.com/shareup/precise-iso-8601-date-formatter.git",

Package.swift

@@ -757,12 +757,6 @@ private extension SQLiteDatabase {
 
         var config = Configuration()
         config.journalMode = isInMemory ? .default : .wal
-        // NOTE: GRDB recommends `defaultTransactionKind` be set
-        //       to `.immediate` in order to prevent `SQLITE_BUSY`
-        //       errors.
-        //
-        // https://swiftpackageindex.com/groue/grdb.swift/v6.24.2/documentation/grdb/databasesharing#How-to-limit-the-SQLITEBUSY-error
-        config.defaultTransactionKind = .immediate
         config.busyMode = .timeout(busyTimeout)
         config.observesSuspensionNotifications = true
         config.maximumReaderCount = max(