Add package lock file (#76)

Author: josesimoes

System.IO.FileSystem/System.IO.FileSystem.nfproj

@@ -18,6 +18,8 @@
     <TargetFrameworkVersion>v1.0</TargetFrameworkVersion>
     <NF_IsCoreLibrary>True</NF_IsCoreLibrary>
     <DocumentationFile>bin\$(Configuration)\System.IO.FileSystem.xml</DocumentationFile>
+    <RestorePackagesWithLockFile>true</RestorePackagesWithLockFile>
+    <RestoreLockedMode Condition="'$(TF_BUILD)' == 'True' or '$(ContinuousIntegrationBuild)' == 'True'">true</RestoreLockedMode>
   </PropertyGroup>
   <PropertyGroup>
     <SignAssembly>true</SignAssembly>

System.IO.FileSystem/packages.lock.json

@@ -0,0 +1,37 @@
+{
+  "version": 1,
+  "dependencies": {
+    ".NETnanoFramework,Version=v1.0": {
+      "nanoFramework.CoreLibrary": {
+        "type": "Direct",
+        "requested": "[1.12.0, 1.12.0]",
+        "resolved": "1.12.0",
+        "contentHash": "qQrFNXmJiStMC4VXk5cVMOJp23/qlT9FW5i9i+igwQVwraQTtvpkam8yK1hj992jqrbjoCIFZP4Hw9E8H0pB7w=="
+      },
+      "nanoFramework.Runtime.Events": {
+        "type": "Direct",
+        "requested": "[1.10.0, 1.10.0]",
+        "resolved": "1.10.0",
+        "contentHash": "ZRDjzVoTdc6+3sUNk9vORz4HHonYYGM4ED2V8VcfkYC8xQ8VFoaP8U6mXLd70ocmyhGaP9GK86sxHUQykSK7vA=="
+      },
+      "nanoFramework.System.IO.Streams": {
+        "type": "Direct",
+        "requested": "[1.1.15, 1.1.15]",
+        "resolved": "1.1.15",
+        "contentHash": "eb7Zz3G301mgRo13n609wZvyaXZ/C9unPYn5Vz34OAEdGX1RDJufpcW+2v28ux3goj8x2BXuj717d4VVVJUotA=="
+      },
+      "nanoFramework.System.Text": {
+        "type": "Direct",
+        "requested": "[1.2.7, 1.2.7]",
+        "resolved": "1.2.7",
+        "contentHash": "ax4CrqYHNXoEBjaIW7dIv1CM4PxWcCc6lN2xSzGLZf7F/JZ0O7t0el86PPN2P/DfOyyBKSDAmrZjEx4q8mvgSw=="
+      },
+      "Nerdbank.GitVersioning": {
+        "type": "Direct",
+        "requested": "[3.5.113, 3.5.113]",
+        "resolved": "3.5.113",
+        "contentHash": "4fBSMkqhi410qlkjPm+Mxfk8iO3C7dmgdVS7ljsfVO21WEzZCHP1VCOqB6rlOPfPidR/oxX+/Do/I7meCAz+Jg=="
+      }
+    }
+  }
+}