update to connectable

Sources/SQLite/SQL/SQLiteAlterTableBuilder.swift

@@ -1,4 +1,4 @@
-extension SQLAlterTableBuilder where Connection.Connection.Query.AlterTable == SQLiteAlterTable {
+extension SQLAlterTableBuilder where Connectable.Connection.Query.AlterTable == SQLiteAlterTable {
     /// Renames the table.
     ///
     ///     conn.alter(table: Bar.self).rename(to: "foo").run()

Sources/SQLite/SQL/SQLiteCreateTable.swift

@@ -1,4 +1,4 @@
-extension SQLCreateTableBuilder where Connection.Connection.Query.CreateTable == SQLiteCreateTable {
+extension SQLCreateTableBuilder where Connectable.Connection.Query.CreateTable == SQLiteCreateTable {
     /// By default, every row in SQLite has a special column, usually called the "rowid", that uniquely identifies that row within
     /// the table. However if the phrase "WITHOUT ROWID" is added to the end of a CREATE TABLE statement, then the special "rowid"
     /// column is omitted. There are sometimes space and performance advantages to omitting the rowid.

Sources/SQLite/SQL/SQLiteDropIndex.swift

@@ -20,17 +20,17 @@ public final class SQLiteDropIndexBuilder<Connectable>: SQLQueryBuilder
     public var dropIndex: SQLiteDropIndex
 
     /// See `SQLQueryBuilder`.
-    public var connection: Connectable
+    public var connectable: Connectable
 
     /// See `SQLQueryBuilder`.
     public var query: SQLiteQuery {
         return .dropIndex(dropIndex)
     }
 
     /// Creates a new `SQLCreateIndexBuilder`.
-    public init(_ dropIndex: SQLiteDropIndex, on connection: Connectable) {
+    public init(_ dropIndex: SQLiteDropIndex, on connectable: Connectable) {
         self.dropIndex = dropIndex
-        self.connection = connection
+        self.connectable = connectable
     }
 }