upgrade dev dependencies

package.json

@@ -133,12 +133,11 @@
     "fancy-log": "^1.3.3",
     "fast-plist": "0.1.2",
     "file-loader": "^4.2.0",
-    "github-releases": "^0.4.1",
     "glob": "^5.0.13",
     "gulp": "^4.0.0",
     "gulp-atom-electron": "^1.22.0",
     "gulp-azure-storage": "^0.11.1",
-    "gulp-bom": "^1.0.0",
+    "gulp-bom": "^3.0.0",
     "gulp-buffer": "0.0.2",
     "gulp-concat": "^2.6.1",
     "gulp-cssnano": "^2.1.3",
@@ -153,7 +152,7 @@
     "gulp-rename": "^1.2.0",
     "gulp-replace": "^0.5.4",
     "gulp-shell": "^0.6.5",
-    "gulp-sourcemaps": "^1.11.0",
+    "gulp-sourcemaps": "^3.0.0",
     "gulp-tsb": "4.0.5",
     "gulp-untar": "^0.0.7",
     "gulp-vinyl-zip": "^2.1.2",
@@ -223,4 +222,4 @@
     "elliptic": "^6.5.3",
     "nwmatcher": "^1.4.4"
   }
-}
+}