Syntax: Update QML syntax definiton

Update grammar and language configuration file
to support more cases like,

* attached signal handler
* group notation of grouped properties
* type annotation on function parameters and return value
* inline component syntax
* pragma statement other than Signleton
* QML type with prefix from qualified import (e.g. T.Button {})
* JS template string
* addtional auto closing pairs. etc

Task-number: VSCODEEXT-13
Change-Id: If7f05f9a436a55e5002e0ccfc6bd7bf06614efbc
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>

package.json

@@ -350,7 +350,7 @@
       {
         "language": "qml",
         "scopeName": "source.qml",
-        "path": "./res/lang/qml/qml.qmlproject.tmLanguage"
+        "path": "./res/lang/qml/qml.qmlproject.tmLanguage.json"
       },
       {
         "language": "qmldir",

res/lang/qml/language-configuration.json

@@ -13,13 +13,19 @@
     ["[", "]"],
     ["(", ")"],
     ["\"", "\""],
-    ["'", "'"]
+    ["'", "'"],
+    ["`", "`"],
+    ["/*", "*/"],
+    ["/**", "*/"],
+    ["/*!", "*/"]
   ],
   "surroundingPairs": [
     ["{", "}"],
     ["[", "]"],
     ["(", ")"],
+    ["<", ">"],
     ["\"", "\""],
-    ["'", "'"]
+    ["'", "'"],
+    ["`", "`"]
   ]
 }