Squashed commit of the following:

commit 95479c8ad744db48386a5c78e54ef8da80e9120b
Author: Chris Lane <chris@chris-allen-lane.com>
Date:   Wed Apr 28 12:26:32 2021 -0400

    chore(version): bump version to 4.2.1

commit 6956f51cae
Author: Chris Lane <chris@chris-allen-lane.com>
Date:   Wed Apr 28 12:24:21 2021 -0400

    fix(Makefile): `vendor-update`

    Update the `vendor-update` build target to run `go mod vendor` after
    updating dependencies.

commit 0aca411279
Author: Chris Lane <chris@chris-allen-lane.com>
Date:   Wed Apr 28 12:23:24 2021 -0400

    chore(deps): update dependencies

commit e847956b02
Author: Chris Lane <chris@chris-allen-lane.com>
Date:   Wed Apr 28 08:26:51 2021 -0400

    chore(deps): build updates

    - Upgrade `go` to `1.16.3`

    - Attempt to fix build errors regarding dependencies

vendor/github.com/alecthomas/chroma/lexers/l/lighttpd.go

@@ -6,14 +6,18 @@ import (
 )
 
 // Lighttpd Configuration File lexer.
-var Lighttpd = internal.Register(MustNewLexer(
+var Lighttpd = internal.Register(MustNewLazyLexer(
 	&Config{
 		Name:      "Lighttpd configuration file",
 		Aliases:   []string{"lighty", "lighttpd"},
 		Filenames: []string{},
 		MimeTypes: []string{"text/x-lighttpd-conf"},
 	},
-	Rules{
+	lighttpdRules,
+))
+
+func lighttpdRules() Rules {
+	return Rules{
 		"root": {
 			{`#.*\n`, CommentSingle, nil},
 			{`/\S*`, Name, nil},
@@ -26,5 +30,5 @@ var Lighttpd = internal.Register(MustNewLexer(
 			{`"([^"\\]*(?:\\.[^"\\]*)*)"`, LiteralStringDouble, nil},
 			{`\s+`, Text, nil},
 		},
-	},
-))
+	}
+}

vendor/github.com/alecthomas/chroma/lexers/l/llvm.go

@@ -6,14 +6,18 @@ import (
 )
 
 // Llvm lexer.
-var Llvm = internal.Register(MustNewLexer(
+var Llvm = internal.Register(MustNewLazyLexer(
 	&Config{
 		Name:      "LLVM",
 		Aliases:   []string{"llvm"},
 		Filenames: []string{"*.ll"},
 		MimeTypes: []string{"text/x-llvm"},
 	},
-	Rules{
+	llvmRules,
+))
+
+func llvmRules() Rules {
+	return Rules{
 		"root": {
 			Include("whitespace"),
 			{`([-a-zA-Z$._][\w\-$.]*|"[^"]*?")\s*:`, NameLabel, nil},
@@ -39,5 +43,5 @@ var Llvm = internal.Register(MustNewLexer(
 			{Words(``, ``, `void`, `half`, `float`, `double`, `x86_fp80`, `fp128`, `ppc_fp128`, `label`, `metadata`, `token`), KeywordType, nil},
 			{`i[1-9]\d*`, Keyword, nil},
 		},
-	},
-))
+	}
+}

vendor/github.com/alecthomas/chroma/lexers/l/lua.go

@@ -6,14 +6,18 @@ import (
 )
 
 // Lua lexer.
-var Lua = internal.Register(MustNewLexer(
+var Lua = internal.Register(MustNewLazyLexer(
 	&Config{
 		Name:      "Lua",
 		Aliases:   []string{"lua"},
 		Filenames: []string{"*.lua", "*.wlua"},
 		MimeTypes: []string{"text/x-lua", "application/x-lua"},
 	},
-	Rules{
+	luaRules,
+))
+
+func luaRules() Rules {
+	return Rules{
 		"root": {
 			{`#!.*`, CommentPreproc, nil},
 			Default(Push("base")),
@@ -71,5 +75,5 @@ var Lua = internal.Register(MustNewLexer(
 			{`"`, LiteralStringDouble, Pop(1)},
 			{`[^\\"]+`, LiteralStringDouble, nil},
 		},
-	},
-))
+	}
+}