build(deps): bump async from 2.6.1 to 3.1.0 (#98)

* Bump async from 2.6.1 to 3.1.0

Bumps [async](https://github.com/caolan/async) from 2.6.1 to 3.1.0.
- [Release notes](https://github.com/caolan/async/releases)
- [Changelog](https://github.com/caolan/async/blob/master/CHANGELOG.md)
- [Commits](caolan/async@v2.6.1...v3.1.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

* chore: clean up to fix travis

Co-authored-by: Lucas Hrabovsky <hrabovsky.lucas@gmail.com>

.npmignore

@@ -1,4 +1,3 @@
 test/
 .eslintrc
-.jsfmtrc
 .travis.yml

.travis.yml

@@ -1,15 +1,11 @@
 sudo: false
+dist: bionic
 language: node_js
 node_js:
-  - 5
-  - 6
-  - 7
-  - node
-
+  - 12.4.0
+install:
+  - npm ci
 script:
-  - npm run ci
+  - npm run check
   - npm test
-
-cache:
-  directories:
-    - node_modules
+cache: npm