feat: update to Angular 8, Nebular 4 (#2114)

Author: nnixaa

.travis.yml

@@ -4,8 +4,6 @@ sudo: false
 dist: trusty
 
 node_js:
-  - '8'
-  - '9'
   - '10'
 
 branches:

angular.json

@@ -12,6 +12,7 @@
           "builder": "@angular-devkit/build-angular:browser",
           "options": {
             "preserveSymlinks": true,
+            "rebaseRootRelativeCssUrls": true,
             "outputPath": "dist",
             "index": "src/index.html",
             "main": "src/main.ts",

browserslist

@@ -0,0 +1,12 @@
+# This file is used by the build system to adjust CSS and JS output to support the specified browsers below.
+# For additional information regarding the format and rule options, please see:
+# https://github.com/browserslist/browserslist#queries
+
+# You can see what browsers were selected by your queries by running:
+#   npx browserslist
+
+> 0.5%
+last 2 versions
+Firefox ESR
+not dead
+IE 11