upgrade dependencies

- upgrade dependencies
- move browserslist to package.json
- simplify postCSS plugins that don't accept arguments to function names

gulp.d/tasks/build.js

@@ -23,7 +23,7 @@ module.exports = (src, dest, preview) => () => {
   const opts = { base: src, cwd: src }
   const sourcemaps = preview || process.env.SOURCEMAPS === 'true'
   const postcssPlugins = [
-    postcssImport(),
+    postcssImport,
     postcssUrl([
       {
         filter: '**/~typeface-*/files/*',
@@ -38,8 +38,8 @@ module.exports = (src, dest, preview) => () => {
       },
     ]),
     postcssVar({ preserve: preview ? 'preserve-computed' : false }),
-    postcssCalc(),
-    autoprefixer({ browsers: ['last 2 versions'] }),
+    postcssCalc,
+    autoprefixer,
     preview ? () => {} : cssnano({ preset: 'default' }),
   ]
 

package.json

@@ -10,42 +10,45 @@
   "engines": {
     "node": ">= 8.0.0"
   },
+  "browserslist": [
+    "last 2 versions"
+  ],
   "devDependencies": {
     "asciidoctor.js": "1.5.9",
-    "autoprefixer": "~9.4",
+    "autoprefixer": "~9.6",
     "browser-pack-flat": "~3.4",
     "browserify": "~16.2",
     "cssnano": "~4.1",
-    "eslint": "~5.11",
+    "eslint": "~5.16",
     "eslint-config-standard": "~12.0",
-    "eslint-plugin-import": "~2.14",
-    "eslint-plugin-node": "~8.0",
-    "eslint-plugin-promise": "~4.0",
+    "eslint-plugin-import": "~2.17",
+    "eslint-plugin-node": "~9.1",
+    "eslint-plugin-promise": "~4.1",
     "eslint-plugin-standard": "~4.0",
-    "fs-extra": "~7.0",
+    "fs-extra": "~8.0",
     "gifsicle": "4.0.0",
     "gulp": "~4.0",
     "gulp-concat": "~2.6",
     "gulp-connect": "~5.7",
     "gulp-eslint": "~5.0",
-    "gulp-imagemin": "~5.0",
+    "gulp-imagemin": "~6.0",
     "gulp-postcss": "~8.0",
-    "gulp-stylelint": "~8.0",
+    "gulp-stylelint": "~9.0",
     "gulp-uglify": "~3.0",
     "gulp-vinyl-zip": "~2.1 >=2.1.2",
-    "handlebars": "~4.0",
-    "highlight.js": "~9.13",
+    "handlebars": "~4.1",
+    "highlight.js": "~9.15",
     "js-yaml": "~3.13",
-    "merge-stream": "~1.0",
+    "merge-stream": "~2.0",
     "postcss-calc": "~7.0",
     "postcss-custom-properties": "~8.0",
     "postcss-import": "~12.0",
     "postcss-url": "~8.0",
-    "prettier-eslint": "~8.8",
+    "prettier-eslint": "~9.0",
     "require-directory": "~2.1",
     "require-from-string": "~2.0",
-    "stylelint": "~9.9",
-    "stylelint-config-standard": "~18.2",
+    "stylelint": "~10.1",
+    "stylelint-config-standard": "~18.3",
     "through2": "~3.0",
     "typeface-roboto": "0.0.54",
     "typeface-roboto-mono": "0.0.54",