Update CodeMirror to version 5.49.0 (#8381)

* Update CodeMirror to version 5.49.0

* Update CodeMirror versions in librejs and VERSIONS

public/vendor/plugins/codemirror/mode/protobuf/index.html

@@ -9,7 +9,7 @@
 <script src="protobuf.js"></script>
 <style>.CodeMirror { border-top: 1px solid #ddd; border-bottom: 1px solid #ddd; }</style>
 <div id=nav>
-  <a href="http://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a>
+  <a href="https://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a>
 
   <ul>
     <li><a href="../../index.html">Home</a>
@@ -54,9 +54,49 @@ message Person {
    required bool deleted = 11 [default = false];
 }
 
-</textarea></form>
+</textarea>
+  <textarea id="code2" name="code2">
+syntax = "proto3";
+package tutorial;
+
+import "google/protobuf/timestamp.proto";
+option java_package = "com.example.tutorial";
+option java_outer_classname = "AddressBookProtos";
+option csharp_namespace = "Google.Protobuf.Examples.AddressBook";
+
+message Person {
+  string name = 1;
+  int32 id = 2;  // Unique ID number for this person.
+  string email = 3;
+
+  enum PhoneType {
+    MOBILE = 0;
+    HOME = 1;
+    WORK = 2;
+  }
+
+  message PhoneNumber {
+    string number = 1;
+    PhoneType type = 2;
+  }
+
+  repeated PhoneNumber phones = 4;
+
+  google.protobuf.Timestamp last_updated = 5;
+}
+
+// Our address book file is just one of these.
+message AddressBook {
+  repeated Person people = 1;
+}
+service Test {
+  rpc SayHello (HelloRequest) returns (HelloReply) {}
+  rpc SayHelloAgain (HelloRequest) returns (HelloReply) {}
+}</textarea>
+</form>
     <script>
       var editor = CodeMirror.fromTextArea(document.getElementById("code"), {});
+      var editor = CodeMirror.fromTextArea(document.getElementById("code2"), {});
     </script>
 
     <p><strong>MIME types defined:</strong> <code>text/x-protobuf</code>.</p>