Migrates to rollup and yarn, and fixes a test.

Author: ctrlplusb

.babelrc

@@ -1,32 +1,3 @@
 {
-  "presets": [
-    ["env", { "targets": { "node": true } }],
-    "stage-3",
-    "react"
-  ],
-  "plugins": [
-    "transform-class-properties"
-  ],
-  "env": {
-    "commonjs": {
-      "presets": [
-        "latest",
-        "stage-3",
-        "react"
-      ],
-      "plugins": [
-        "transform-class-properties"
-      ]
-    },
-    "umd": {
-      "presets": [
-        ["latest", { "es2015": { "modules": false } }],
-        "stage-3",
-        "react"
-      ],
-      "plugins": [
-        "transform-class-properties"
-      ]
-    }
-  }
+  "presets": [["env", { "targets": { "node": true } }], "stage-3", "react"]
 }

.gitignore

@@ -11,6 +11,8 @@ npm-debug.log
 # Jest
 coverage
 
-# Flow
-flow-coverage
-flow-typed
+# Build output
+dist
+
+# IDEs
+.vscode

.travis.yml

@@ -1,16 +1,13 @@
 sudo: false
 language: node_js
 cache:
-  npm: true
+  yarn: true
   directories:
     - node_modules
 node_js:
 - '8'
 script:
-# Unfortunately flow falls over when a dep exists in peer deps and others. :(
-# @see https://github.com/flowtype/flow-typed/issues/528
-#- yarn run flow:defs
-- npm run check
+- npm run precommit
 after_success:
 # Deploy code coverage report to codecov.io
 - npm run test:coverage:deploy