Fix minor typo errors in docs (#467)

Author: jledentu

docs/guide/integration.md

@@ -1,6 +1,6 @@
 # Integration
 
-**chartjs-plugin-zoom** can be integrated with plain JavaScript or with different module loaders. The examples below show to load the plugin in different systems.
+**chartjs-plugin-zoom** can be integrated with plain JavaScript or with different module loaders. The examples below show how to load the plugin in different systems.
 
 ## Script Tag
 

docs/guide/options.md

@@ -43,8 +43,8 @@ const chart = new Chart('id', {
 | Name | Arguments | Description
 | ---- | --------- | -----------
 | `onPan` | `{chart}` | Called while the chart is being panned
-| `onPanComplete` | `{chart}` | Called once panning is copleted
-| `onPanRejected` | `{chart,event}` | Callend when panning is rejected due to missing modifier key. `event` is the a [hammer event](https://hammerjs.github.io/api#event-object) that failed
+| `onPanComplete` | `{chart}` | Called once panning is completed
+| `onPanRejected` | `{chart,event}` | Called when panning is rejected due to missing modifier key. `event` is the a [hammer event](https://hammerjs.github.io/api#event-object) that failed
 
 ## Zoom
 
@@ -67,5 +67,5 @@ const chart = new Chart('id', {
 | Name | Arguments | Description
 | ---- | --------- | -----------
 | `onZoom` | `{chart}` | Called while the chart is being zoomed
-| `onZoomComplete` | `{chart}` | Called once zooming is copleted
-| `onZoomRejected` | `{chart,event}` | Callend when zoom is rejected due to missing modifier key. `event` is the a [hammer event](https://hammerjs.github.io/api#event-object) that failed
+| `onZoomComplete` | `{chart}` | Called once zooming is completed
+| `onZoomRejected` | `{chart,event}` | Called when zoom is rejected due to missing modifier key. `event` is the a [hammer event](https://hammerjs.github.io/api#event-object) that failed