fix: dynamic pathing for windows, fixes #357 (#608)

@mikehardy, 

## Description

This is the required change that is necessary for windows to resolve the reference path in different environments (outside of visual studio which automatically resolves references).

## Compatibility

| OS      | Implemented |
| ------- | :---------: |
| iOS     |    ❌     |
| Android |    ❌     |
| Windows |    ✅     |

## Checklist

<!-- Check completed item: [X] -->

* [ ] I have tested this on a device/simulator for each compatible OS
* [ ] I added the documentation in `README.md`
* [x] I mentioned this change in `CHANGELOG.md`
* [ ] I updated the typings files (`deviceinfo.d.ts`, `deviceinfo.js.flow`)
* [ ] I updated the web polyfill (`web/index.js`)

CHANGELOG.md

@@ -4,6 +4,7 @@
  * fix: Use API-specific permissions to get phone number (https://github.com/react-native-community/react-native-device-info/pull/269)
  * fix: Add OnePlus A6010 to devicesWithNothc list (https://github.com/react-native-community/react-native-device-info/pull/604)
  * fix: use reactContext vs getApplicationContext() (https://github.com/react-native-community/react-native-device-info/pull/382)
+ * fix: dynamic reference path on windows depending on environment (https://github.com/react-native-community/react-native-device-info/pull/608)
 
 ### 1.1.0
  * Add `supportedABIs()` (https://github.com/react-native-community/react-native-device-info/pull/598)

windows/RNDeviceInfo/RNDeviceInfo.csproj

@@ -16,6 +16,10 @@
     <MinimumVisualStudioVersion>14</MinimumVisualStudioVersion>
     <FileAlignment>512</FileAlignment>
     <ProjectTypeGuids>{A5A43C5B-DE2A-4C0C-9213-0A381AF9435A};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <ReactWindowsRoot>..\..\node_modules</ReactWindowsRoot>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)' != 'Development'">
+    <ReactWindowsRoot>..\..\..</ReactWindowsRoot>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>
@@ -117,7 +121,7 @@
     </PackageReference>
   </ItemGroup>
   <ItemGroup>
-    <ProjectReference Include="..\..\..\react-native-windows\ReactWindows\ReactNative\ReactNative.csproj">
+    <ProjectReference Include="$(ReactWindowsRoot)\react-native-windows\ReactWindows\ReactNative\ReactNative.csproj">
       <Project>{c7673ad5-e3aa-468c-a5fd-fa38154e205c}</Project>
       <Name>ReactNative</Name>
     </ProjectReference>