http to https (#944)

Signed-off-by: Bruno Lesieur <bruno.lesieur@gmail.com>

docs/en/intro.md

@@ -58,6 +58,6 @@ This is the basic idea behind Vuex, inspired by [Flux](https://facebook.github.i
 
 Although Vuex helps us deal with shared state management, it also comes with the cost of more concepts and boilerplate. It's a trade-off between short term and long term productivity.
 
-If you've never built a large-scale SPA and jump right into Vuex, it may feel verbose and daunting. That's perfectly normal - if your app is simple, you will most likely be fine without Vuex. A simple [global event bus](http://vuejs.org/v2/guide/components.html#Non-Parent-Child-Communication) may be all you need. But if you are building a medium-to-large-scale SPA, chances are you have run into situations that make you think about how to better handle state outside of your Vue components, and Vuex will be the natural next step for you. There's a good quote from Dan Abramov, the author of Redux:
+If you've never built a large-scale SPA and jump right into Vuex, it may feel verbose and daunting. That's perfectly normal - if your app is simple, you will most likely be fine without Vuex. A simple [global event bus](https://vuejs.org/v2/guide/components.html#Non-Parent-Child-Communication) may be all you need. But if you are building a medium-to-large-scale SPA, chances are you have run into situations that make you think about how to better handle state outside of your Vue components, and Vuex will be the natural next step for you. There's a good quote from Dan Abramov, the author of Redux:
 
 > Flux libraries are like glasses: you’ll know when you need them.

docs/en/state.md

@@ -8,7 +8,7 @@ The single state tree does not conflict with modularity - in later chapters we w
 
 ### Getting Vuex State into Vue Components
 
-So how do we display state inside the store in our Vue components? Since Vuex stores are reactive, the simplest way to "retrieve" state from it is simply returning some store state from within a [computed property](http://vuejs.org/guide/computed.html):
+So how do we display state inside the store in our Vue components? Since Vuex stores are reactive, the simplest way to "retrieve" state from it is simply returning some store state from within a [computed property](https://vuejs.org/guide/computed.html):
 
 ``` js
 // let's create a Counter component

docs/en/testing.md

@@ -219,4 +219,4 @@ mocha test-bundle.js
 
 #### Running in Browser with Karma + karma-webpack
 
-Consult the setup in [vue-loader documentation](http://vue-loader.vuejs.org/en/workflow/testing.html).
+Consult the setup in [vue-loader documentation](https://vue-loader.vuejs.org/en/workflow/testing.html).