prepare Datadog 0.14 release (#123)

Author: gruebel

opentelemetry-datadog/CHANGELOG.md

@@ -2,6 +2,14 @@
 
 ## vNext
 
+## v0.14.0
+
+### Changed
+
+- Bump opentelemetry and opentelemetry_sdk versions to 0.26
+- Bump opentelemetry-http and opentelemetry-semantic-conventions versions to 0.26
+- Remove unused itertools dependency
+
 ## v0.13.0
 
 ### Changed

opentelemetry-datadog/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "opentelemetry-datadog"
-version = "0.13.0"
+version = "0.14.0"
 description = "Datadog exporters and propagators for OpenTelemetry"
 homepage = "https://github.com/open-telemetry/opentelemetry-rust-contrib/tree/main/opentelemetry-datadog"
 repository = "https://github.com/open-telemetry/opentelemetry-rust-contrib/tree/main/opentelemetry-datadog"