Fix issue on IE cannot open SOL page

The root cause is that TextEncoder/TextDecoder does not support IE
More detail at https://caniuse.com/#feat=textencoder

One workable solution is to include text-encoder lib,
as this patch did.

Tested:
IE visit BMC and navigate to "#/server-control/remote-console"
SOL page is working well.

Change-Id: I5019c626afcf67916252db4115af7616c7a9759b
Signed-off-by: Kuiying Wang <kuiying.wang@intel.com>
diff --git a/package.json b/package.json
index 8211487..5d291cd 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,8 @@
     "ng-toast": "2.0.0",
     "pkg-dir": "4.2.0",
     "regenerator-runtime": "0.13.3",
-    "xterm": "3.14.5"
+    "xterm": "3.14.5",
+    "text-encoding": "0.7.0"
   },
   "peerDependencies": {},
   "devDependencies": {