build: update Angular to v7.2.15 (#412)

- Update to Angular 7
- Update all dependencies to their latest versions
- Refactor tslint configuration and rules
- Update travis to use Angular 7
- Refactor forkJoin to remove tslint error

Fixes: #407

tslint.json

@@ -49,7 +49,6 @@
     "no-console": [
       true,
       "debug",
-      "info",
       "time",
       "timeEnd",
       "trace"
@@ -139,12 +138,12 @@
       "kebab-case"
     ],
     "no-output-on-prefix": true,
-    "use-input-property-decorator": true,
-    "use-output-property-decorator": true,
-    "use-host-property-decorator": true,
+    "no-inputs-metadata-property": true,
+    "no-outputs-metadata-property": true,
+    "no-host-metadata-property": true,
     "no-input-rename": true,
     "no-output-rename": true,
-    "use-life-cycle-interface": true,
+    "use-lifecycle-interface": true,
     "use-pipe-transform-interface": true,
     "component-class-suffix": true,
     "directive-class-suffix": true