Version bump. (#1276)

* Version bump.

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "vscode-docker",
-  "version": "0.8.1",
+  "version": "0.8.2-alpha",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {

package.json

@@ -1,6 +1,6 @@
 {
     "name": "vscode-docker",
-    "version": "0.8.1",
+    "version": "0.8.2-alpha",
     "preview": true,
     "publisher": "ms-azuretools",
     "displayName": "Docker",