fix(engine/sqlite): Lowercase ast.ResTarget.Name (#2433)

* fix(engine/sqlite): To lowercase ast.ResTarget.Name

The SQLite engine lowercases ast.ResTarget.Name to match the behavior of pg_query.

fix #2120

* test: add endtoend

* chore: v1.19.1

internal/endtoend/testdata/case_sensitive/sqlite/query.sql

@@ -0,0 +1,12 @@
+CREATE TABLE contacts (
+	pid	TEXT,
+	CustomerName	TEXT
+);
+
+-- name: InsertContact :exec
+INSERT INTO contacts (
+    pid,
+    CustomerName
+)
+VALUES (?,?)
+;

internal/endtoend/testdata/case_sensitive/sqlite/sqlc.json

@@ -0,0 +1 @@
+{"version": "1", "packages": [{"path": "go", "engine": "sqlite", "schema": "query.sql", "queries": "query.sql", "name": "querytest"}]}

internal/engine/sqlite/convert.go

@@ -493,7 +493,7 @@ func (c *cc) getCols(core *parser.Select_coreContext) []ast.Node {
 		}
 
 		if col.AS_() != nil {
-			name := col.Column_alias().GetText()
+			name := identifier(col.Column_alias().GetText())
 			target.Name = &name
 		}
 
@@ -805,7 +805,7 @@ func (c *cc) convertExprLists(lists []parser.IExprContext) *ast.List {
 func (c *cc) convertColumnNames(cols []parser.IColumn_nameContext) *ast.List {
 	list := &ast.List{Items: []ast.Node{}}
 	for _, c := range cols {
-		name := c.GetText()
+		name := identifier(c.GetText())
 		list.Items = append(list.Items, &ast.ResTarget{
 			Name: &name,
 		})
@@ -912,7 +912,7 @@ func (c *cc) convertUpdate_stmtContext(n Update_stmt) ast.Node {
 
 	list := &ast.List{}
 	for i, col := range n.AllColumn_name() {
-		colName := col.GetText()
+		colName := identifier(col.GetText())
 		target := &ast.ResTarget{
 			Name: &colName,
 			Val:  c.convert(n.Expr(i)),