Merge branch 'master' into 1.0.1

Author: eugene-matvejev

circle.yml

@@ -1,8 +1,10 @@
 machine:
     node:
-        version: 6.9
+        version: 8.11
 
 dependencies:
+    pre:
+        - echo "//registry.npmjs.org/:_authToken=$NPM_TOKEN" >> ~/.npmrc
     cache_directories:
         - ~/.npm/
 
@@ -12,3 +14,9 @@ test:
     override:
         - npm test -- --coverage
         - codecov
+
+deployment:
+    production:
+        branch: master
+        commands:
+            - npm publish