GitHub actions (#32)

* chore: fixes snapshots test

* chore: adds github actions, issue and feat templates

* chore: fixes eslint

* chore: remvoes circle ci and adds publish action

* chore: adds github-release automation using actions

.github/issue_template.md

@@ -0,0 +1,32 @@
+<!--
+First of all, please read this section
+
+https://github.com/verdaccio/verdaccio/blob/master/CONTRIBUTING.md#reporting-a-bug
+
+Some advices before file an issue
+  * Give a brief explanation of the issue, suggestion or feature to request.
+  * If the issue is a question, provide as much information you have available.
+  * How can I do in order to reproduce it? What environment?
+  * Define which version the issue happens and whether previous version the behavior is correct.
+  * Provide your config file is really helpful. Please be aware to hide sensitive data (passwords, server IP, etc) before post.
+-->
+
+#### My reason:
+#### Steps to reproduce:
+#### App Version:
+#### Config file:
+#### Additional information:
+
+ - `$ NODE_DEBUG=request verdaccio` display request calls (verdaccio <--> uplinks)
+ - `$ DEBUG=express:* verdaccio` enable extreme verdaccio debug mode (verdaccio api)
+ - `$ npm -ddd` prints:
+ - `$ npm config get registry` prints:
+ - Verdaccio terminal output
+ - Which (Windows, OS X/macOS, or Linux) environment are you running verdaccio?:
+ - Verdaccio configuration file, eg: `cat ~/.config/verdaccio/config.yaml`
+  - Container Options:
+   - Docker?:
+   - Kubernetes?:
+
+#### Additional verbose log:
+