Add CircleCI badge to README

Signed-off-by: Greg Haskins <[email protected]>

Author: ghaskins

README.md

@@ -1,4 +1,4 @@
-# Temporal Clojure SDK 
+# Temporal Clojure SDK [![CircleCI](https://dl.circleci.com/status-badge/img/gh/manetu/temporal-clojure-sdk/tree/master.svg?style=svg)](https://dl.circleci.com/status-badge/redirect/gh/manetu/temporal-clojure-sdk/tree/master)
 
 [Temporal](https://github.com/temporalio/temporal) is a Workflow-as-Code platform for building and operating
 resilient applications using developer-friendly primitives, instead of constantly fighting your infrastructure.
@@ -44,4 +44,4 @@ Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
-limitations under the License.
+limitations under the License.