add travis file

Author: David Sheldrick

.travis.yml

@@ -0,0 +1,7 @@
+language: node_js
+node_js:
+- '8'
+- '9'
+script:
+  - yarn test --runInBand
+  - yarn lint

index.js

@@ -158,15 +158,15 @@ const tsConfig = (() => {
 
   const expectedTsConfigFileName = 'tsconfig.json'
 
-  let root;
+  let root
   try {
     root = findRoot(process.cwd(), dir => {
       return fs.existsSync(path.join(dir, expectedTsConfigFileName))
     })
   } catch (error) {
     throw new Error(
       `Unable to find project root: no "${expectedTsConfigFileName}" file found. ` +
-      `Original error message: ${error.message}`
+        `Original error message: ${error.message}`
     )
   }
 
@@ -177,7 +177,7 @@ const tsConfig = (() => {
   } catch (error) {
     throw new Error(
       `Unable to find ${expectedTsConfigFileName} at ${tsConfigPath}` +
-      `Original error message: ${error.message}`
+        `Original error message: ${error.message}`
     )
   }
 })()

package.json

@@ -18,6 +18,7 @@
   },
   "scripts": {
     "precommit": "lint-staged",
+    "lint": "eslint index.js __specs__/**/*.js",
     "test": "jest"
   },
   "lint-staged": {