Looks like the pulsar-client-node can not run with the current pulsar master code

**Motivation**

Install the pulsar-client-node with latest pulsar-client-cpp failed.
error logs:

```
make: Entering directory '/pulsar/node_modules/pulsar-client/build'
CC(target) Release/obj.target/nothing/../node-addon-api/nothing.o
AR(target) Release/obj.target/../node-addon-api/nothing.a
COPY Release/nothing.a
CXX(target) Release/obj.target/Pulsar/src/addon.o
In file included from ../src/addon.cc:20:
../src/Message.h:24:10: fatal error: pulsar/c/message.h: No such file or directory
#include
^~~~~~~~~~~~~~~~~~~~
compilation terminated.
make: *** [Pulsar.target.mk:124: Release/obj.target/Pulsar/src/addon.o] Error 1
make: Leaving directory '/pulsar/node_modules/pulsar-client/build'
gyp ERR! build error
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack at ChildProcess.onExit (/usr/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:194:23)
gyp ERR! stack at ChildProcess.emit (events.js:376:20)
gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:277:12)
gyp ERR! System Linux 5.10.25-linuxkit
gyp ERR! command "/usr/bin/node" "/usr/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "build" "--fallback-to-build" "--module=/pulsar/node_modules/pulsar-client/build/Release/libpulsar.node" "--module_name=libpulsar" "--module_path=/pulsar/node_modules/pulsar-client/build/Release" "--napi_version=8" "--node_abi_napi=napi" "--napi_build_version=0" "--node_napi_label=node-v83"
gyp ERR! cwd /pulsar/node_modules/pulsar-client
gyp ERR! node -v v14.17.0
gyp ERR! node-gyp -v v5.1.0
gyp ERR! not ok
node-pre-gyp ERR! build error
node-pre-gyp ERR! stack Error: Failed to execute '/usr/bin/node /usr/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js build --fallback-to-build --module=/pulsar/node_modules/pulsar-client/build/Release/libpulsar.node --module_name=libpulsar --module_path=/pulsar/node_modules/pulsar-client/build/Release --napi_version=8 --node_abi_napi=napi --napi_build_version=0 --node_napi_label=node-v83' (1)
node-pre-gyp ERR! stack at ChildProcess. (/pulsar/node_modules/node-pre-gyp/lib/util/compile.js:83:29)
node-pre-gyp ERR! stack at ChildProcess.emit (events.js:376:20)
node-pre-gyp ERR! stack at maybeClose (internal/child_process.js:1055:16)
node-pre-gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:288:5)
node-pre-gyp ERR! System Linux 5.10.25-linuxkit
node-pre-gyp ERR! command "/usr/bin/node" "/pulsar/node_modules/.bin/node-pre-gyp" "install" "--fallback-to-build"
node-pre-gyp ERR! cwd /pulsar/node_modules/pulsar-client
node-pre-gyp ERR! node -v v14.17.0
node-pre-gyp ERR! node-pre-gyp -v v0.15.0
node-pre-gyp ERR! not ok
Failed to execute '/usr/bin/node /usr/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js build --fallback-to-build --module=/pulsar/node_modules/pulsar-client/build/Release/libpulsar.node --module_name=libpulsar --module_path=/pulsar/node_modules/pulsar-client/build/Release --napi_version=8 --node_abi_napi=napi --napi_build_version=0 --node_napi_label=node-v83' (1)
npm WARN enoent ENOENT: no such file or directory, open '/pulsar/package.json'
npm WARN pulsar No description
npm WARN pulsar No repository field.
npm WARN pulsar No README data
npm WARN pulsar No license field.

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! pulsar-client@1.3.0 install: `node-pre-gyp install --fallback-to-build`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the pulsar-client@1.3.0 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /root/.npm/_logs/2021-06-07T14_02_09_069Z-debug.log
```

---

We should have a CI to run the tests with the latest pulsar code to check the compatibility./

Reproduziere den Fehler bei npm install mit dem neuesten pulsar-client-cpp und untersuche anschließend src/addon.cc und src/Message.h auf die fehlende Abhängigkeit pulsar/c/message.h. Überprüfe die bestehende CI- und Testkonfiguration, um festzustellen, wie die Kompatibilität geprüft wird. Erledigt ist dies, wenn CI die Clienttests gegen den neuesten Pulsar-Code ausführt und Kompatibilitätsfehler erkennt.

Vom Indexierungsmodell aus dem Issue-Text verfasst.