prep for 1.2.0 release (#32)

Author: dgrove-oss

NOTICE.txt

@@ -1,5 +1,5 @@
 Apache OpenWhisk Runtime Rust
-Copyright 2016-2020 The Apache Software Foundation
+Copyright 2016-2021 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).

core/rust1.34/CHANGELOG.md

@@ -19,6 +19,9 @@
 
 # Rust  OpenWhisk Runtime Container
 
+## 1.2.0
+  - Build proxy from openwhisk-runtime-go 1.17.0 release
+
 ## 1.1.0
   - Move from golang:1.12 to golang:1.15 to build the runtime proxy.
   - Build proxy from openwhisk-runtime-go 1.16.0 release