Enable TS Strict mode and fix linting errors

.gitignore

@@ -1,23 +1,40 @@
-tests/**/*.js
-tests/**/*.d.ts
-tests/**/*.metadata.json
-src/**/*.js
-src/**/*.d.ts
-src/**/*.metadata.json
-*.map
-*.js
-*.d.ts
-*.metadata.json
-.vscode
-coverage
-documentation
-bundles
-node_modules
+# See http://help.github.com/ignore-files/ for more about ignoring files.
+
+# compiled output
+/dist
+/tmp
+/out-tsc
+/documentation
+
+# dependencies
+/node_modules
+
+# IDEs and editors
+/.idea
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+
+# IDE - VSCode
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+
+# misc
+/.sass-cache
+/connect.lock
+/coverage
+/libpeerconnection.log
 npm-debug.log
-!src/mqttjs.d.ts
-!typings.d.ts
-!config/*
-!karma.conf.js
-!webpack.config.js
-!make.js
-!clean.js
+yarn-error.log
+testem.log
+/typings
+
+# System Files
+.DS_Store
+Thumbs.db

.travis.yml

@@ -1,10 +1,10 @@
 language: node_js
 sudo: false
 node_js:
-  - 7
-  - 6
+  - 8
 script:
-  npm test
+  - npm run lint
+  - npm test
 branches:
   only:
   - master
@@ -13,4 +13,4 @@ before_install:
 
 before_script:
   - export DISPLAY=:99.0
-  - sh -e /etc/init.d/xvfb start
+  - sh -e /etc/init.d/xvfb start

angular.json

@@ -0,0 +1,44 @@
+{
+  "$schema": "./node_modules/@angular-devkit/core/src/workspace/workspace-schema.json",
+  "version": 1,
+  "newProjectRoot": "projects",
+  "projects": {
+    "ngx-mqtt": {
+      "root": "projects/ngx-mqtt",
+      "projectType": "library",
+      "architect": {
+        "build": {
+          "builder": "@angular-devkit/build-ng-packagr:build",
+          "options": {
+            "project": "projects/ngx-mqtt/ng-package.json"
+          },
+          "configurations": {
+            "production": {
+              "project": "projects/ngx-mqtt/ng-package.prod.json"
+            }
+          }
+        },
+        "test": {
+          "builder": "@angular-devkit/build-angular:karma",
+          "options": {
+            "main": "projects/ngx-mqtt/src/test.ts",
+            "tsConfig": "projects/ngx-mqtt/tsconfig.spec.json",
+            "karmaConfig": "projects/ngx-mqtt/karma.conf.js"
+          }
+        },
+        "lint": {
+          "builder": "@angular-devkit/build-angular:tslint",
+          "options": {
+            "tsConfig": [
+              "projects/ngx-mqtt/tsconfig.lint.json",
+              "projects/ngx-mqtt/tsconfig.spec.json"
+            ],
+            "exclude": [
+              "**/node_modules/**"
+            ]
+          }
+        }
+      }
+    }
+  }
+}