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/e/ebnf.go

@@ -6,14 +6,18 @@ import (
 )
 
 // Ebnf lexer.
-var Ebnf = internal.Register(MustNewLexer(
+var Ebnf = internal.Register(MustNewLazyLexer(
 	&Config{
 		Name:      "EBNF",
 		Aliases:   []string{"ebnf"},
 		Filenames: []string{"*.ebnf"},
 		MimeTypes: []string{"text/x-ebnf"},
 	},
-	Rules{
+	ebnfRules,
+))
+
+func ebnfRules() Rules {
+	return Rules{
 		"root": {
 			Include("whitespace"),
 			Include("comment_start"),
@@ -47,5 +51,5 @@ var Ebnf = internal.Register(MustNewLexer(
 		"identifier": {
 			{`([a-zA-Z][\w \-]*)`, Keyword, nil},
 		},
-	},
-))
+	}
+}

vendor/github.com/alecthomas/chroma/lexers/e/elixir.go

@@ -6,14 +6,18 @@ import (
 )
 
 // Elixir lexer.
-var Elixir = internal.Register(MustNewLexer(
+var Elixir = internal.Register(MustNewLazyLexer(
 	&Config{
 		Name:      "Elixir",
 		Aliases:   []string{"elixir", "ex", "exs"},
 		Filenames: []string{"*.ex", "*.exs"},
 		MimeTypes: []string{"text/x-elixir"},
 	},
-	Rules{
+	elixirRules,
+))
+
+func elixirRules() Rules {
+	return Rules{
 		"root": {
 			{`\s+`, Text, nil},
 			{`#.*$`, CommentSingle, nil},
@@ -273,5 +277,5 @@ var Elixir = internal.Register(MustNewLexer(
 			{`\\.`, LiteralStringOther, nil},
 			{`'[a-zA-Z]*`, LiteralStringOther, Pop(1)},
 		},
-	},
-))
+	}
+}

vendor/github.com/alecthomas/chroma/lexers/e/elm.go

@@ -6,14 +6,18 @@ import (
 )
 
 // Elm lexer.
-var Elm = internal.Register(MustNewLexer(
+var Elm = internal.Register(MustNewLazyLexer(
 	&Config{
 		Name:      "Elm",
 		Aliases:   []string{"elm"},
 		Filenames: []string{"*.elm"},
 		MimeTypes: []string{"text/x-elm"},
 	},
-	Rules{
+	elmRules,
+))
+
+func elmRules() Rules {
+	return Rules{
 		"root": {
 			{`\{-`, CommentMultiline, Push("comment")},
 			{`--.*`, CommentSingle, nil},
@@ -55,5 +59,5 @@ var Elm = internal.Register(MustNewLexer(
 			{`\|\]`, NameEntity, Pop(1)},
 			{`.*\n`, NameEntity, nil},
 		},
-	},
-))
+	}
+}

vendor/github.com/alecthomas/chroma/lexers/e/emacs.go

@@ -522,14 +522,24 @@ var (
 )
 
 // EmacsLisp lexer.
-var EmacsLisp = internal.Register(TypeRemappingLexer(MustNewLexer(
+var EmacsLisp = internal.Register(TypeRemappingLexer(MustNewLazyLexer(
 	&Config{
 		Name:      "EmacsLisp",
 		Aliases:   []string{"emacs", "elisp", "emacs-lisp"},
 		Filenames: []string{"*.el"},
 		MimeTypes: []string{"text/x-elisp", "application/x-elisp"},
 	},
-	Rules{
+	emacsLispRules,
+), TypeMapping{
+	{NameVariable, NameFunction, emacsBuiltinFunction},
+	{NameVariable, NameBuiltin, emacsSpecialForms},
+	{NameVariable, NameException, emacsErrorKeywords},
+	{NameVariable, NameBuiltin, append(emacsBuiltinFunctionHighlighted, emacsMacros...)},
+	{NameVariable, KeywordPseudo, emacsLambdaListKeywords},
+}))
+
+func emacsLispRules() Rules {
+	return Rules{
 		"root": {
 			Default(Push("body")),
 		},
@@ -572,11 +582,5 @@ var EmacsLisp = internal.Register(TypeRemappingLexer(MustNewLexer(
 			{`\\\n`, LiteralString, nil},
 			{`"`, LiteralString, Pop(1)},
 		},
-	},
-), TypeMapping{
-	{NameVariable, NameFunction, emacsBuiltinFunction},
-	{NameVariable, NameBuiltin, emacsSpecialForms},
-	{NameVariable, NameException, emacsErrorKeywords},
-	{NameVariable, NameBuiltin, append(emacsBuiltinFunctionHighlighted, emacsMacros...)},
-	{NameVariable, KeywordPseudo, emacsLambdaListKeywords},
-}))
+	}
+}

vendor/github.com/alecthomas/chroma/lexers/e/erlang.go

@@ -6,14 +6,18 @@ import (
 )
 
 // Erlang lexer.
-var Erlang = internal.Register(MustNewLexer(
+var Erlang = internal.Register(MustNewLazyLexer(
 	&Config{
 		Name:      "Erlang",
 		Aliases:   []string{"erlang"},
 		Filenames: []string{"*.erl", "*.hrl", "*.es", "*.escript"},
 		MimeTypes: []string{"text/x-erlang"},
 	},
-	Rules{
+	erlangRules,
+))
+
+func erlangRules() Rules {
+	return Rules{
 		"root": {
 			{`\s+`, Text, nil},
 			{`%.*\n`, Comment, nil},
@@ -62,5 +66,5 @@ var Erlang = internal.Register(MustNewLexer(
 			{`,`, Punctuation, Pop(1)},
 			{`(?=\})`, Punctuation, Pop(1)},
 		},
-	},
-))
+	}
+}