build(dependencies): update dev and peer dependencies (#67)

### Summary

* Updates `devDependencies` and `peerDependencies`
* Updates `Rollup` configuration using new dependencies
* Updates `.travis.yml` to use `.nvmrc` as `semantic-release` requires node version `>=10.18`

Author: jaebradley

.nvmrc

@@ -1,2 +1,2 @@
-10.15.3
+10.18.0
 

.travis.yml

@@ -4,8 +4,6 @@ cache:
     - ~/.npm
 notifications:
   email: true
-node_js:
-  - '8'
 install: npm install
 before_install:
   - npm install -g npm@5