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/j/j.go

@@ -6,14 +6,18 @@ import (
 )
 
 // J lexer.
-var J = internal.Register(MustNewLexer(
+var J = internal.Register(MustNewLazyLexer(
 	&Config{
 		Name:      "J",
 		Aliases:   []string{"j"},
 		Filenames: []string{"*.ijs"},
 		MimeTypes: []string{"text/x-j"},
 	},
-	Rules{
+	jRules,
+))
+
+func jRules() Rules {
+	return Rules{
 		"root": {
 			{`#!.*$`, CommentPreproc, nil},
 			{`NB\..*`, CommentSingle, nil},
@@ -69,5 +73,5 @@ var J = internal.Register(MustNewLexer(
 			{`''`, LiteralString, nil},
 			{`'`, LiteralString, Pop(1)},
 		},
-	},
-))
+	}
+}

vendor/github.com/alecthomas/chroma/lexers/j/java.go

@@ -6,15 +6,20 @@ import (
 )
 
 // Java lexer.
-var Java = internal.Register(MustNewLexer(
+var Java = internal.Register(MustNewLazyLexer(
 	&Config{
 		Name:      "Java",
 		Aliases:   []string{"java"},
 		Filenames: []string{"*.java"},
 		MimeTypes: []string{"text/x-java"},
 		DotAll:    true,
+		EnsureNL:  true,
 	},
-	Rules{
+	javaRules,
+))
+
+func javaRules() Rules {
+	return Rules{
 		"root": {
 			{`[^\S\n]+`, Text, nil},
 			{`//.*?\n`, CommentSingle, nil},
@@ -47,5 +52,5 @@ var Java = internal.Register(MustNewLexer(
 		"import": {
 			{`[\w.]+\*?`, NameNamespace, Pop(1)},
 		},
-	},
-))
+	}
+}

vendor/github.com/alecthomas/chroma/lexers/j/javascript.go

@@ -26,11 +26,11 @@ var JavascriptRules = Rules{
 		{`\A#! ?/.*?\n`, CommentHashbang, nil},
 		{`^(?=\s|/|<!--)`, Text, Push("slashstartsregex")},
 		Include("commentsandwhitespace"),
-		{`(\.\d+|[0-9]+\.[0-9]*)([eE][-+]?[0-9]+)?`, LiteralNumberFloat, nil},
+		{`\d+(\.\d*|[eE][+\-]?\d+)`, LiteralNumberFloat, nil},
 		{`0[bB][01]+`, LiteralNumberBin, nil},
 		{`0[oO][0-7]+`, LiteralNumberOct, nil},
 		{`0[xX][0-9a-fA-F]+`, LiteralNumberHex, nil},
-		{`[0-9]+`, LiteralNumberInteger, nil},
+		{`[0-9_]+`, LiteralNumberInteger, nil},
 		{`\.\.\.|=>`, Punctuation, nil},
 		{`\+\+|--|~|&&|\?|:|\|\||\\(?=\n)|(<<|>>>?|==?|!=?|[-<>+*%&|^/])=?`, Operator, Push("slashstartsregex")},
 		{`[{(\[;,]`, Punctuation, Push("slashstartsregex")},
@@ -65,7 +65,7 @@ var Javascript = internal.Register(MustNewLexer(
 	&Config{
 		Name:      "JavaScript",
 		Aliases:   []string{"js", "javascript"},
-		Filenames: []string{"*.js", "*.jsm"},
+		Filenames: []string{"*.js", "*.jsm", "*.mjs"},
 		MimeTypes: []string{"application/javascript", "application/x-javascript", "text/x-javascript", "text/javascript"},
 		DotAll:    true,
 		EnsureNL:  true,

vendor/github.com/alecthomas/chroma/lexers/j/json.go

@@ -6,7 +6,7 @@ import (
 )
 
 // JSON lexer.
-var JSON = internal.Register(MustNewLexer(
+var JSON = internal.Register(MustNewLazyLexer(
 	&Config{
 		Name:         "JSON",
 		Aliases:      []string{"json"},
@@ -15,7 +15,11 @@ var JSON = internal.Register(MustNewLexer(
 		NotMultiline: true,
 		DotAll:       true,
 	},
-	Rules{
+	jsonRules,
+))
+
+func jsonRules() Rules {
+	return Rules{
 		"whitespace": {
 			{`\s+`, Text, nil},
 		},
@@ -51,5 +55,5 @@ var JSON = internal.Register(MustNewLexer(
 		"root": {
 			Include("value"),
 		},
-	},
-))
+	}
+}

vendor/github.com/alecthomas/chroma/lexers/j/jsx.go

@@ -8,7 +8,7 @@ import (
 // JSX lexer.
 //
 // This was generated from https://github.com/fcurella/jsx-lexer
-var JSX = internal.Register(MustNewLexer(
+var JSX = internal.Register(MustNewLazyLexer(
 	&Config{
 		Name:      "react",
 		Aliases:   []string{"jsx", "react"},
@@ -16,7 +16,11 @@ var JSX = internal.Register(MustNewLexer(
 		MimeTypes: []string{"text/jsx", "text/typescript-jsx"},
 		DotAll:    true,
 	},
-	Rules{
+	jsxRules,
+))
+
+func jsxRules() Rules {
+	return Rules{
 		"commentsandwhitespace": {
 			{`\s+`, Text, nil},
 			{`<!--`, Comment, nil},
@@ -91,5 +95,5 @@ var JSX = internal.Register(MustNewLexer(
 			{`}`, Punctuation, Pop(1)},
 			Include("root"),
 		},
-	},
-))
+	}
+}

vendor/github.com/alecthomas/chroma/lexers/j/jungle.go

@@ -5,14 +5,18 @@ import (
 	"github.com/alecthomas/chroma/lexers/internal"
 )
 
-var Jungle = internal.Register(MustNewLexer(
+var Jungle = internal.Register(MustNewLazyLexer(
 	&Config{
 		Name:      "Jungle",
 		Aliases:   []string{"jungle"},
 		Filenames: []string{"*.jungle"},
 		MimeTypes: []string{"text/x-jungle"},
 	},
-	Rules{
+	jungleRules,
+))
+
+func jungleRules() Rules {
+	return Rules{
 		"root": {
 			{`[^\S\n]+`, Text, nil},
 			{`\n`, Text, nil},
@@ -46,5 +50,5 @@ var Jungle = internal.Register(MustNewLexer(
 			{`[a-zA-Z_]\w*`, Name, nil},
 			Default(Pop(1)),
 		},
-	},
-))
+	}
+}