package.json: prepare for 0.17.0 dev

Just version change.

Change-Id: Id1e2d00cb3f16eb77128ead661da5c1fd68110c0
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/247284
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
diff --git a/package-lock.json b/package-lock.json
index 001259c..e98f049 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "go",
-  "version": "0.16.1",
+  "version": "0.17.0-dev",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 305ddac..f94b2ae 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "go",
   "displayName": "Go",
-  "version": "0.16.1",
+  "version": "0.17.0-dev",
   "publisher": "golang",
   "description": "Rich Go language support for Visual Studio Code",
   "author": {