chore: drop node 6 and upgrade deps

.gitignore

@@ -61,4 +61,5 @@ typings/
 
 # dotenv environment variables file
 .env
+api-docs
 

package.json

@@ -4,7 +4,7 @@
   "description": "A gRPC extencion for LoopBack Next",
   "main": "index.js",
   "engines": {
-    "node": ">=6"
+    "node": ">=8"
   },
   "scripts": {
     "build": "npm run build:dist && npm run build:dist6",
@@ -14,7 +14,7 @@
     "build:apidocs": "lb-apidocs",
     "build:watch": "lb-tsc --watch",
     "clean": "lb-clean loopback-grpc*.tgz dist dist6 package api-docs",
-    "prepare": "npm run build && npm run build:apidocs",
+    "prepublishOnly": "npm run build && npm run build:apidocs",
     "pretest": "npm run lint:fix && npm run clean && npm run build:current",
     "test": "lb-mocha \"DIST/test/unit/**/*.js\" \"DIST/test/acceptance/**/*.js\"",
     "lint": "npm run prettier:check && npm run tslint",
@@ -50,19 +50,19 @@
     "dist6"
   ],
   "dependencies": {
-    "@loopback/context": "^4.0.0-alpha.14",
-    "@loopback/core": "^4.0.0-alpha.16",
-    "@loopback/metadata": "^4.0.0-alpha.6",
-    "@loopback/repository": "^4.0.0-alpha.10",
-    "@loopback/rest": "^4.0.0-alpha.3",
+    "@loopback/context": "^4.0.0-alpha.30",
+    "@loopback/core": "^4.0.0-alpha.32",
+    "@loopback/metadata": "^4.0.0-alpha.9",
+    "@loopback/repository": "^4.0.0-alpha.28",
+    "@loopback/rest": "^4.0.0-alpha.24",
     "@mean-expert/protoc-ts": "0.0.2",
     "glob": "^7.1.2",
     "grpc": "^1.6.6",
     "protobufjs": "^6.8.0"
   },
   "devDependencies": {
-    "@loopback/build": "^4.0.0-alpha.10",
-    "@loopback/testlab": "^4.0.0-alpha.9",
+    "@loopback/build": "^4.0.0-alpha.13",
+    "@loopback/testlab": "^4.0.0-alpha.23",
     "@types/glob": "^5.0.35"
   }
 }