chore: update to otel 0.15.0

Author: Flarna

packages/opentelemetry-propagator-jaeger/package.json

@@ -70,7 +70,7 @@
     "webpack": "4.43.0"
   },
   "dependencies": {
-    "@opentelemetry/api": "^0.14.0",
-    "@opentelemetry/core": "^0.14.0"
+    "@opentelemetry/api": "^0.15.0",
+    "@opentelemetry/core": "^0.15.0"
   }
 }