Syncing proto files to support bg indexing and updated CHANGELOG for v20.03.0 release (#110)

* updated api.proto file and package files
* Updating README docs and CHANGELOG

Signed-off-by: Prashant Shahi <prashant@dgraph.io>

Author: prashant-shahi

CHANGELOG.md

@@ -5,6 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [v20.03.0] - 2020-04-01
+
+### Changed
+
+- Synced proto files to latest version to support background indexing ([#110][])
+
+[#110]: https://github.com/dgraph-io/dgraph-js/issues/110
+
 ## [v2.1.0] - 2020-01-30
 
 ### Fixed
@@ -138,6 +146,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### Added
 - Full compatibility with Dgraph v1.0.0
 
+[v20.03.0]: https://github.com/dgraph-io/dgraph-js/compare/v2.1.0...v20.03.0
 [v2.1.0]: https://github.com/dgraph-io/dgraph-js/compare/v2.0.2...v2.1.0
 [v2.0.2]: https://github.com/dgraph-io/dgraph-js/compare/v2.0.1...v2.0.2
 [v2.0.1]: https://github.com/dgraph-io/dgraph-js/compare/v2.0.0...v2.0.1

README.md

@@ -65,6 +65,7 @@ use a different version of this client.
 |:--------------:|:-----------------:|
 |     1.0.X      |      *1.X.Y*      |
 |     1.1.X      |      *2.X.Y*      |
+|    20.03.0     |     *20.03.0*     |
 
 Note: Only API breakage from *v1.X.Y* to *v2.X.Y* is in
 the function `DgraphClient.newTxn().mutate()`. This function returns a `messages.Assigned`
@@ -113,6 +114,19 @@ op.setSchema(schema);
 await dgraphClient.alter(op);
 ```
 
+Starting Dgraph version 20.03.0, indexes can be computed in the background.
+You can set `setRunInBackground` field of the `Operation` object to `true`
+before passing it to the `DgraphClient#alter(Operation)` method. You can find more details
+[here](https://docs.dgraph.io/master/query-language/#indexes-in-background).
+
+```js
+const schema = "name: string @index(exact) .";
+const op = new dgraph.Operation();
+op.setSchema(schema);
+op.setRunInBackground(true);
+await dgraphClient.alter(op);
+```
+
 > NOTE: Many of the examples here use the `await` keyword which requires
 > `async/await` support which is available on Node.js >= v7.6.0. For prior versions,
 > the expressions following `await` can be used just like normal `Promise`:
@@ -420,3 +434,4 @@ Make sure you have a Dgraph server running on localhost before you run this task
 ```sh
 npm test
 ```
+

generated/api_pb.d.ts

@@ -189,6 +189,9 @@ export class Operation extends jspb.Message {
   getDropValue(): string;
   setDropValue(value: string): void;
 
+  getRunInBackground(): boolean;
+  setRunInBackground(value: boolean): void;
+
   serializeBinary(): Uint8Array;
   toObject(includeInstance?: boolean): Operation.AsObject;
   static toObject(includeInstance: boolean, msg: Operation): Operation.AsObject;
@@ -206,6 +209,7 @@ export namespace Operation {
     dropAll: boolean,
     dropOp: Operation.DropOpMap[keyof Operation.DropOpMap],
     dropValue: string,
+    runInBackground: boolean,
   }
 
   export interface DropOpMap {