Prepare release 0.7.0

Signed-off-by: Yuri Shkuro <[email protected]>

Author: yurishkuro

CHANGELOG.md

@@ -1,10 +1,18 @@
 Changes by Version
 ==================
 
-0.6.1 (unreleased)
+0.7.1 (unreleased)
 ------------------
 
-- Nothing yet.
+-- Nothing yet.
+
+
+0.7.0 (2021-02-28)
+------------------
+
+- Add support for W3C traceparent/tracestate propagation (#255)
+- Add support for generating 128 bit trace ids (#254)
+- Do not strip leading zeros from trace IDs and span IDs (#259)
 
 
 0.6.0 (2020-06-08)