deps: bump to fastify 3.3.0 (#51)

Changes in 3.2.1 to fastify resulted in a broken framework. The fastify
module added a `context` property to the request object, which we had
been decorating with a property by the same name. This commit bumps to
the latest 3.3.0 of fastify, and changes the property that we decorate
the request object with to `fcontext`. These changes are entirely
internal and do not affect the user function.

index.js

@@ -26,9 +26,9 @@ function start(func, port, cb, options) {
   const server = fastify({ logger: log });
 
   // All incoming requests get a Context object
-  server.decorateRequest('context');
+  server.decorateRequest('fcontext');
   server.addHook('preHandler', (req, reply, done) => {
-    req.context = new Context(req, reply);
+    req.fcontext = new Context(req, reply);
     done();
   });
 

lib/event-handler.js

@@ -15,7 +15,7 @@ function use(fastify, opts, done) {
     if (request.isCloudEvent()) {
       try {
         const event = Receiver.accept(request.headers, request.body);
-        request.context.cloudevent = event;
+        request.fcontext.cloudevent = event;
       } catch (err) {
         if (err.message.startsWith('invalid spec version')) {
           reply.code(406);

lib/request-handler.js

@@ -11,12 +11,11 @@ module.exports = function(fastify, opts, done) {
   fastify.post('/', doPost);
 
   async function doGet(request, reply) {
-    sendReply(reply, await invokeFunction(request.context, reply.log));
+    sendReply(reply, await invokeFunction(request.fcontext, reply.log));
   }
 
   async function doPost(request, reply) {
-    // request.context.body = request.body;
-    sendReply(reply, await invokeFunction(request.context, reply.log));
+    sendReply(reply, await invokeFunction(request.fcontext, reply.log));
   }
 
   eventHandler(fastify, null, done);

package.json

@@ -20,7 +20,7 @@
   ],
   "dependencies": {
     "cloudevents": "^3.1.0",
-    "fastify": "^3.2.0",
+    "fastify": "^3.3.0",
     "overload-protection": "^1.1.0",
     "qs": "^6.9.0"
   },