Bump client version to 2.0.0 (#167)

* Bump client version to 2.0.0

Signed-off-by: Vacha Shah <vachshah@amazon.com>

* Adding test support for other unreleased branches

Signed-off-by: Vacha Shah <vachshah@amazon.com>

.github/workflows/integration-unreleased.yml

@@ -1,25 +1,24 @@
 name: Integration with Unreleased OpenSearch
 
-on:
-  push:
-    branches:
-      - "main"
-  pull_request:
-    branches:
-      - "main"
-
-env:
-  OPENSEARCH_VERSION: '2.0'
+on: [push, pull_request]
 
 jobs:
   test:
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        entry:
+          - { opensearch_ref: '1.x' }
+          - { opensearch_ref: '2.0' }
+          - { opensearch_ref: '2.x' }
+          - { opensearch_ref: 'main' }
     steps:
       - name: Checkout OpenSearch
         uses: actions/checkout@v2
         with:
           repository: opensearch-project/opensearch
-          ref: ${{ env.OPENSEARCH_VERSION }}
+          ref: ${{ matrix.entry.opensearch_ref }}
           path: opensearch
 
         # This step builds the docker image tagged as opensearch:test. It will be further used in /ci/run-tests to test against unreleased OpenSearch.
@@ -28,8 +27,9 @@ jobs:
         run: |
           cd opensearch
           ./gradlew assemble
+
       - name: Checkout Python Client
         uses: actions/checkout@v2
 
       - name: Run Integration Test
-        run: "./.ci/run-tests opensearch false ${{ env.OPENSEARCH_VERSION }}.0-SNAPSHOT"
+        run: "./.ci/run-tests opensearch false SNAPSHOT"

.github/workflows/unified-release.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        stack_version: ['1.1.0']
+        stack_version: ['2.0.0']
 
     steps:
       - name: Checkout