fix: update uglify-js version (#754)

Fixes a build error `ENOENT: no such file or directory`

Closes #752

Author: alan-agius4

package.json

@@ -54,7 +54,7 @@
     "strip-bom": "^3.0.0",
     "stylus": "^0.54.5",
     "tar": "^4.4.1",
-    "uglify-js": "^3.0.7",
+    "uglify-js": "^3.3.20",
     "update-notifier": "^2.3.0"
   },
   "peerDependencies": {

src/lib/flatten/uglify.ts

@@ -18,6 +18,7 @@ export async function minifyJsFile(inputPath: string): Promise<string> {
 
   const result = minify(inputFileBuffer.toString(), {
     sourceMap: {
+      includeSources: true,
       content: JSON.parse(inputSourceMapBuffer.toString()),
       url: basename(sourcemapOut)
     },

yarn.lock

@@ -758,10 +758,14 @@ commander@2.11.0:
   version "2.11.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.11.0.tgz#157152fd1e7a6c8d98a5b715cf376df928004563"
 
-commander@^2.12.0, commander@^2.9.0, commander@~2.12.1:
+commander@^2.12.0, commander@^2.9.0:
   version "2.12.2"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.12.2.tgz#0f5946c427ed9ec0d91a46bb9def53e54650e555"
 
+commander@~2.15.0:
+  version "2.15.1"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.15.1.tgz#df46e867d0fc2aec66a34662b406a9ccafff5b0f"
+
 commenting@1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/commenting/-/commenting-1.0.5.tgz#3104d542cac8a4f27b3d51438f4b80431fe4526b"
@@ -3718,11 +3722,11 @@ uglify-js@^2.6:
   optionalDependencies:
     uglify-to-browserify "~1.0.0"
 
-uglify-js@^3.0.7:
-  version "3.2.1"
-  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.2.1.tgz#d6427fd45a25fefc5d196689c0c772a6915e10fe"
+uglify-js@^3.3.20:
+  version "3.3.20"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.3.20.tgz#dc8bdee7d454c7d31dddc36f922d170bfcee3a0a"
   dependencies:
-    commander "~2.12.1"
+    commander "~2.15.0"
     source-map "~0.6.1"
 
 uglify-to-browserify@~1.0.0: