Add strip bom to package json

Author: akshita31

package-lock.json

@@ -76,10 +76,11 @@
     "mkdirp": "0.5.1",
     "node-filter-async": "0.0.4",
     "open": "*",
-    "remove-bom-buffer": "^3.0.0",
+    "remove-bom-buffer": "3.0.0",
     "request-light": "0.2.2",
     "rxjs": "5.5.6",
     "semver": "*",
+    "strip-bom": "3.0.0",
     "tmp": "0.0.33",
     "vscode-debugprotocol": "1.6.1",
     "vscode-extension-telemetry": "0.0.15",