feat: update to go modules

vendor/github.com/alecthomas/chroma/lexers/b/brainfuck.go

@@ -1,34 +0,0 @@
-package b
-
-import (
-	. "github.com/alecthomas/chroma" // nolint
-	"github.com/alecthomas/chroma/lexers/internal"
-)
-
-// Brainfuck lexer.
-var Brainfuck = internal.Register(MustNewLexer(
-	&Config{
-		Name:      "Brainfuck",
-		Aliases:   []string{"brainfuck", "bf"},
-		Filenames: []string{"*.bf", "*.b"},
-		MimeTypes: []string{"application/x-brainfuck"},
-	},
-	Rules{
-		"common": {
-			{`[.,]+`, NameTag, nil},
-			{`[+-]+`, NameBuiltin, nil},
-			{`[<>]+`, NameVariable, nil},
-			{`[^.,+\-<>\[\]]+`, Comment, nil},
-		},
-		"root": {
-			{`\[`, Keyword, Push("loop")},
-			{`\]`, Error, nil},
-			Include("common"),
-		},
-		"loop": {
-			{`\[`, Keyword, Push()},
-			{`\]`, Keyword, Pop(1)},
-			Include("common"),
-		},
-	},
-))