added esnext config file

Author: martinkuba

packages/opentelemetry-propagator-aws-xray/tsconfig.esnext.json

@@ -0,0 +1,19 @@
+{
+  "extends": "../../tsconfig.base.esnext.json",
+  "compilerOptions": {
+    "outDir": "build/esnext",
+    "rootDir": "src",
+    "tsBuildInfoFile": "build/esnext/tsconfig.esnext.tsbuildinfo"
+  },
+  "include": [
+    "src/**/*.ts"
+  ],
+  "references": [
+    {
+      "path": "../../api"
+    },
+    {
+      "path": "../opentelemetry-core"
+    }
+  ]
+}