Fix #3111: Fix dependencies of vscode-dotty

Using "^2.2.1" means "Any 2.x.y version >= 2.2.1", this isn't great for
reproducibility in general, and it also broke the build because
vscode-languageclient 3.4.* depend on a newer vscode engine. This commit
avoids this issue by using fixed version numbers instead.

Author: smarter

vscode-dotty/package.json

@@ -42,13 +42,13 @@
     "daltonjorge.scala"
   ],
   "dependencies": {
-    "child-process-promise": "^2.2.1",
-    "vscode-languageclient": "^3.2.1",
-    "vscode-languageserver": "^3.2.1"
+    "child-process-promise": "2.2.1",
+    "vscode-languageclient": "3.2.1",
+    "vscode-languageserver": "3.2.1"
   },
   "devDependencies": {
-    "typescript": "^2.3.2",
-    "vscode": "^1.1.0",
-    "@types/node": "^7.0.12"
+    "typescript": "2.3.2",
+    "vscode": "1.1.0",
+    "@types/node": "7.0.12"
   }
 }