Upgrade to `uglify-js@3`

gulpfile.js

@@ -66,8 +66,11 @@ var compilerMinimalist = webpack({
 });
 
 function minify(name) {
-  var result = uglify.minify([DIST + '/' + name + '.js'], {
+  var code = String(fs.readFileSync(DIST + '/' + name + '.js'));
-    outSourceMap: name + '.map',
+  var result = uglify.minify(code, {
+    sourceMap: {
+      url: name + '.map'
+    },
     output: {
       comments: /@license/,
       max_line_len: 64000 // extra large because we have embedded code for workers

package-lock.json

@@ -843,6 +843,12 @@
         "delayed-stream": "~1.0.0"
       }
     },
+    "commander": {
+      "version": "2.20.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.0.tgz",
+      "integrity": "sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ==",
+      "dev": true
+    },
     "component-emitter": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.0.tgz",
@@ -5711,50 +5717,20 @@
       "dev": true
     },
     "uglify-js": {
-      "version": "2.8.22",
+      "version": "3.6.0",
-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-2.8.22.tgz",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.6.0.tgz",
-      "integrity": "sha1-1Uk0d4qNoUkD+imjJvskwKtRoaA=",
+      "integrity": "sha512-W+jrUHJr3DXKhrsS7NUVxn3zqMOFn0hL/Ei6v0anCIMoKC93TjcflTagwIHLW7SfMFfiQuktQyFVCFHGUE0+yg==",
       "dev": true,
       "requires": {
-        "source-map": "~0.5.1",
+        "commander": "~2.20.0",
-        "uglify-to-browserify": "~1.0.0",
+        "source-map": "~0.6.1"
-        "yargs": "~3.10.0"
       },
       "dependencies": {
-        "camelcase": {
+        "source-map": {
-          "version": "1.2.1",
+          "version": "0.6.1",
-          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-1.2.1.tgz",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-          "integrity": "sha1-m7UwTS4LVmmLLHWLCKPqqdqlijk=",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
           "dev": true
-        },
-        "cliui": {
-          "version": "2.1.0",
-          "resolved": "https://registry.npmjs.org/cliui/-/cliui-2.1.0.tgz",
-          "integrity": "sha1-S0dXYP+AJkx2LDoXGQMukcf+oNE=",
-          "dev": true,
-          "requires": {
-            "center-align": "^0.1.1",
-            "right-align": "^0.1.1",
-            "wordwrap": "0.0.2"
-          }
-        },
-        "wordwrap": {
-          "version": "0.0.2",
-          "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.2.tgz",
-          "integrity": "sha1-t5Zpu0LstAn4PVg8rVLKF+qhZD8=",
-          "dev": true
-        },
-        "yargs": {
-          "version": "3.10.0",
-          "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.10.0.tgz",
-          "integrity": "sha1-9+572FfdfB0tOMDnTvvWgdFDH9E=",
-          "dev": true,
-          "requires": {
-            "camelcase": "^1.0.2",
-            "cliui": "^2.1.0",
-            "decamelize": "^1.0.0",
-            "window-size": "0.1.0"
-          }
         }
       }
     },

package.json

@@ -42,7 +42,7 @@
     "json-loader": "0.5.7",
     "mkdirp": "0.5.1",
     "mocha": "6.1.4",
-    "uglify-js": "2.8.22",
+    "uglify-js": "3.6.0",
     "webpack": "1.13.1"
   }
 }