Allow @opentelemetry@1.9.0, remove version reference from README

Author: maisano-patreon

README.md

@@ -108,4 +108,4 @@ Please refer to the [SECURITY.md](https://github.com/DataDog/dd-trace-js/blob/ma
 
 Please refer to the [Node.js Custom Instrumentation using OpenTelemetry API](https://docs.datadoghq.com/tracing/trace_collection/custom_instrumentation/nodejs/otel/) document. It includes information on how to use the OpenTelemetry API with dd-trace-js.
 
-Note that our internal implementation of the OpenTelemetry API is currently set within the version range `>=1.0.0 <1.9.0`. This range will be updated at a regular cadence therefore, we recommend updating your tracer to the latest release to ensure up to date support.
+Note that our internal implementation of the OpenTelemetry API is currently set within a version range. This range will be updated at a regular cadence therefore, we recommend updating your tracer to the latest release to ensure up to date support.

package.json

@@ -92,7 +92,7 @@
     "@datadog/pprof": "5.6.0",
     "@datadog/sketches-js": "^2.1.0",
     "@isaacs/ttlcache": "^1.4.1",
-    "@opentelemetry/api": ">=1.0.0 <1.9.0",
+    "@opentelemetry/api": ">=1.0.0 <1.10.0",
     "@opentelemetry/core": "^1.14.0",
     "crypto-randomuuid": "^1.0.0",
     "dc-polyfill": "0.1.6",