fix: Prepare to adopt newest version of StyleLint

Previously, StyleLint had a problem that was preventing us from
using their library in our buildbot tests. To get around this, we
made a custom branch of their library.
Recently, they almost fixed the issue. There's just one minor change
left before we can use their master branch. In the meantime, this
CL changes Shaka Player to use a new fork of StyleLint that is based
on their current master branch, and makes the LESS modifications
that the newest versions ask for.

Change-Id: I78624b3d366e6c22c577ca6707f5a3311f8e808e

.csslintrc

@@ -8,6 +8,6 @@
       }],
       "selector-list-comma-newline-after": "always-multi-line",
       "selector-pseudo-element-colon-notation": "single",
-      "unit-whitelist": ["em", "%", "px", "s", "deg", "vmin", "ms", "vh"]
+      "unit-allowed-list": ["em", "%", "px", "s", "deg", "vmin", "ms", "vh"]
     }
 }

build/compiler.py

@@ -330,12 +330,6 @@ def lint(self, fix=False, force=False):
 
     stylelint = shakaBuildHelpers.get_node_binary('stylelint')
     cmd_line = stylelint + ['--config', self.config_path] + self.source_files
-    # Disables globbing, since that messes up our nightly tests, and we don't
-    # use it anyway.
-    # This is currently a flag added in a fork we maintain, but there is a pull
-    # request in progress for this.
-    # See: https://github.com/stylelint/stylelint/issues/4193
-    cmd_line += ['--disable-globbing'];
 
     if fix:
       cmd_line += ['--fix']

package.json

@@ -53,7 +53,7 @@
     "rimraf": "^2.6.3",
     "sprintf-js": "^1.1.2",
     "stylelint": "github:theodab/stylelint",
-    "stylelint-config-standard": "^18.3.0",
+    "stylelint-config-standard": "^20.0.0",
     "tippy.js": "^4.3.1",
     "ua-parser-js": "github:joeyparrish/ua-parser-js#develop",
     "which": "^1.3.1"

ui/less/general.less

@@ -20,8 +20,8 @@
 }
 
 .shaka-hidden {
-  // Make this override equally specific classes.
-  // If it's hidden, always hide it!
+  /* Make this override equally specific classes.
+   * If it's hidden, always hide it! */
   display: none !important;
 }