Bump version to 0.8.4-SNAPSHOT

Author: karol brejna <karol.brejna@intel.com>

Closes #175 from karol-brejna-i/GEARPUMP-294-version-bump.
diff --git a/docs/version.yml b/docs/version.yml
index bee2022..20c358f 100644
--- a/docs/version.yml
+++ b/docs/version.yml
@@ -1,5 +1,5 @@
 ---
-GEARPUMP_VERSION: "0.8.3"
+GEARPUMP_VERSION: "0.8.4-SNAPSHOT"
 SCALA_BINARY_VERSION: "2.11"
 SCALA_VERSION: "2.11.8"
 ---
diff --git a/version.sbt b/version.sbt
index 2c1d979..51919b1 100644
--- a/version.sbt
+++ b/version.sbt
@@ -16,4 +16,4 @@
  * limitations under the License.
  */
 
-version in ThisBuild := "0.8.3"
+version in ThisBuild := "0.8.4-SNAPSHOT"