update to refactored api

refactor specs

src/sqlite3/connection.cr

@@ -0,0 +1,23 @@
+class SQLite3::Connection < DB::Connection
+  def initialize(options)
+    super
+    filename = options["database"]
+    check LibSQLite3.open_v2(filename, out @db, (LibSQLite3::Flag::READWRITE | LibSQLite3::Flag::CREATE), nil)
+  end
+
+  def prepare(query)
+    Statement2.new(self, query)
+  end
+
+  def perform_close
+    LibSQLite3.close_v2(self)
+  end
+
+  def to_unsafe
+    @db
+  end
+
+  private def check(code)
+    raise Exception.new(self) unless code == 0
+  end
+end

src/sqlite3/driver.cr

@@ -1,21 +1,6 @@
 class SQLite3::Driver < DB::Driver
-  def initialize(options)
-    super
-    filename = options["database"]
-    check LibSQLite3.open_v2(filename, out @db, (LibSQLite3::Flag::READWRITE | LibSQLite3::Flag::CREATE), nil)
-    # @closed = false
-  end
-
-  def prepare(query)
-    Statement2.new(self, query)
-  end
-
-  def to_unsafe
-    @db
-  end
-
-  private def check(code)
-    raise Exception.new(@db) unless code == 0
+  def build_connection
+    SQLite3::Connection.new(options)
   end
 end
 

src/sqlite3/result_set2.cr

@@ -13,7 +13,7 @@ class SQLite3::ResultSet2 < DB::ResultSet
     when LibSQLite3::Code::DONE
       false
     else
-      raise Exception.new(@statement.driver)
+      raise Exception.new(@statement.connection)
     end
   end
 
@@ -65,6 +65,10 @@ class SQLite3::ResultSet2 < DB::ResultSet
     String.new LibSQLite3.column_name(self, index)
   end
 
+  def column_type(index : Int32)
+    raise "not implemented"
+  end
+
   def to_unsafe
     @statement.to_unsafe
   end

src/sqlite3/statement2.cr

@@ -1,10 +1,10 @@
 class SQLite3::Statement2 < DB::Statement
-  def initialize(@driver, sql)
-    check LibSQLite3.prepare_v2(@driver, sql, sql.bytesize + 1, out @stmt, nil)
-    # @closed = false
+  def initialize(connection, sql)
+    super(connection)
+    check LibSQLite3.prepare_v2(@connection, sql, sql.bytesize + 1, out @stmt, nil)
   end
 
-  protected def before_execute
+  protected def begin_parameters
     LibSQLite3.reset(self)
   end
 
@@ -23,7 +23,7 @@ class SQLite3::Statement2 < DB::Statement
     bind_arg(index, value)
   end
 
-  protected def execute
+  protected def perform
     ResultSet2.new(self)
   end
 
@@ -56,7 +56,7 @@ class SQLite3::Statement2 < DB::Statement
   end
 
   private def check(code)
-    raise Exception.new(@driver) unless code == 0
+    raise Exception.new(@connection) unless code == 0
   end
 
   def to_unsafe