Support TypeScript 2.7 and update deps (#46)

Author: teppeis

.travis.yml

@@ -13,6 +13,8 @@ script:
   - npm test
   - npm install --no-save [email protected]
   - npm test
+  - npm install --no-save [email protected]
+  - npm test
   - npm install --no-save typescript@latest
   - npm test
 cache:

README.md

@@ -11,7 +11,7 @@ espower-typescript
 
 ## TypeScript versions
 
-* espower-typescript v8.x uses TypeScript from v2.2 to v2.6
+* espower-typescript v8.x uses TypeScript from v2.2 to v2.7
 * espower-typescript v7.x uses TypeScript v2.1
 * espower-typescript v6.x uses TypeScript v2.0
 * espower-typescript v5.x uses TypeScript v1.8