Update 1 NuGet dependencies

Bumps nanoFramework.Runtime.Events from 2.0.0-preview.11 to 2.0.0-preview.12</br>
[version update]

### ⚠️ This is an automated update. ⚠️

Author: nfbot

nanoFramework.System.Net.nuspec

@@ -21,7 +21,7 @@ This package requires a target with System.Net v$nativeVersion$ (checksum $check
     <dependencies>
       <group targetFramework=".NETnanoFramework1.0">
         <dependency id="nanoFramework.CoreLibrary" version="2.0.0-preview.49" />
-        <dependency id="nanoFramework.Runtime.Events" version="2.0.0-preview.11" />
+        <dependency id="nanoFramework.Runtime.Events" version="2.0.0-preview.12" />
         <dependency id="nanoFramework.System.Text" version="2.0.0-preview.15" />
         <dependency id="nanoFramework.System.Threading" version="2.0.0-preview.9" />
         <dependency id="nanoFramework.System.IO.Streams" version="2.0.0-preview.15" />

nanoFramework.System.Net/System.Net.nfproj

@@ -136,7 +136,7 @@
       <HintPath>..\packages\nanoFramework.CoreLibrary.2.0.0-preview.49\lib\netnano1.0\mscorlib.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.Runtime.Events, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.Runtime.Events.2.0.0-preview.11\lib\netnano1.0\nanoFramework.Runtime.Events.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.Runtime.Events.2.0.0-preview.12\lib\netnano1.0\nanoFramework.Runtime.Events.dll</HintPath>
     </Reference>
     <Reference Include="nanoFramework.System.Text, Version=2.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
       <HintPath>..\packages\nanoFramework.System.Text.2.0.0-preview.15\lib\netnano1.0\nanoFramework.System.Text.dll</HintPath>

nanoFramework.System.Net/packages.config

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="nanoFramework.CoreLibrary" version="2.0.0-preview.49" targetFramework="netnano1.0" />
-  <package id="nanoFramework.Runtime.Events" version="2.0.0-preview.11" targetFramework="netnano1.0" />
+  <package id="nanoFramework.Runtime.Events" version="2.0.0-preview.12" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.IO.Streams" version="2.0.0-preview.15" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Text" version="2.0.0-preview.15" targetFramework="netnano1.0" />
   <package id="nanoFramework.System.Threading" version="2.0.0-preview.9" targetFramework="netnano1.0" />

nanoFramework.System.Net/packages.lock.json

@@ -10,9 +10,9 @@
       },
       "nanoFramework.Runtime.Events": {
         "type": "Direct",
-        "requested": "[2.0.0-preview.11, 2.0.0-preview.11]",
-        "resolved": "2.0.0-preview.11",
-        "contentHash": "kv+GggxqjVYdv58LRJCF0r0ElZLouYuCKNea++oySdvjyHndK6/3Yb74DWKB7AeW61zR9AP0hJIuBI8GzX6qEQ=="
+        "requested": "[2.0.0-preview.12, 2.0.0-preview.12]",
+        "resolved": "2.0.0-preview.12",
+        "contentHash": "49clC9iMibQ7Sm73xShGsKqjee54JZ7QGuxys1wPkG2tvHIziGtb51U+RxdfdVGz/UtSv9q5ebqo0IYlk7BFxw=="
       },
       "nanoFramework.System.IO.Streams": {
         "type": "Direct",