refactor!: drop php5 support

pkg/parser/parser.go

@@ -3,10 +3,8 @@ package parser
 import (
 	"errors"
 
-	"github.com/VKCOM/php-parser/internal/php5"
 	"github.com/VKCOM/php-parser/internal/php7"
 	"github.com/VKCOM/php-parser/internal/php8"
-	"github.com/VKCOM/php-parser/internal/scanner"
 	"github.com/VKCOM/php-parser/pkg/ast"
 	"github.com/VKCOM/php-parser/pkg/conf"
 	"github.com/VKCOM/php-parser/pkg/version"
@@ -16,9 +14,6 @@ var (
 	// ErrVersionOutOfRange is returned if the version is not supported
 	ErrVersionOutOfRange = errors.New("the version is out of supported range")
 
-	php5RangeStart = &version.Version{Major: 5}
-	php5RangeEnd   = &version.Version{Major: 5, Minor: 6}
-
 	php7RangeStart = &version.Version{Major: 7}
 	php7RangeEnd   = &version.Version{Major: 7, Minor: 4}
 
@@ -39,15 +34,8 @@ func Parse(src []byte, config conf.Config) (ast.Vertex, error) {
 		config.Version = php7RangeEnd
 	}
 
-	if config.Version.InRange(php5RangeStart, php5RangeEnd) {
-		lexer := scanner.NewLexer(src, config)
-		parser = php5.NewParser(lexer, config)
-		parser.Parse()
-		return parser.GetRootNode(), nil
-	}
-
 	if config.Version.InRange(php7RangeStart, php7RangeEnd) {
-		lexer := scanner.NewLexer(src, config)
+		lexer := php7.NewLexer(src, config)
 		parser = php7.NewParser(lexer, config)
 		parser.Parse()
 		return parser.GetRootNode(), nil