Do not skip optional delimiter after aggregate options, fixes #520

src/parse.js

@@ -393,7 +393,6 @@ function parse(source, root) {
                 else
                     parseOptionValue(parent, name);
             }
-            skip(s_semi, true);
         } else
             setOption(parent, name, readValue(true));
         // Does not enforce a delimiter to be universal

tests/data/service.proto

@@ -0,0 +1,16 @@
+syntax = "proto3";
+package myservice;
+
+message DoSomethingRequest {
+}
+
+message DoSomethingResponse {
+}
+
+service MyService {
+  rpc DoSomething(DoSomethingRequest) returns (DoSomethingResponse) {
+    option (google.api.http) = {
+      get: "/v1/dosomething"
+    };
+  };
+}