build: Move 'test' package to dev dependencies (#1928)

The test package is only used for, you guessed it, tests and should not be in the regular deps

resolves #1927

(cherry picked from commit 97ec6a3)

Author: atscott

server/package.json

@@ -20,7 +20,9 @@
     "vscode-jsonrpc": "6.0.0",
     "vscode-languageserver": "7.0.0",
     "vscode-languageserver-textdocument": "^1.0.7",
-    "vscode-uri": "3.0.7",
+    "vscode-uri": "3.0.7"
+  },
+  "devDependencies": {
     "test": "3.3.0"
   },
   "publishConfig": {