Update version and publish data for snap

eng/Versions.props

@@ -8,7 +8,7 @@
     <MajorVersion>3</MajorVersion>
     <MinorVersion>7</MinorVersion>
     <PatchVersion>0</PatchVersion>
-    <PreReleaseVersionLabel>2</PreReleaseVersionLabel>
+    <PreReleaseVersionLabel>3</PreReleaseVersionLabel>
     <VersionPrefix>$(MajorVersion).$(MinorVersion).$(PatchVersion)</VersionPrefix>
     <!--
       By default the assembly version in official builds is "$(MajorVersion).$(MinorVersion).0.0".

eng/config/PublishData.json

@@ -72,13 +72,13 @@
       "vsBranch": "rel/d16.6",
       "vsMajorVersion": 16
     },
-    "release/dev16.7-preview1-vs-deps": {
+    "release/dev16.7-preview2-vs-deps": {
       "nugetKind": ["Shipping", "NonShipping"],
       "version": "3.7.*",
       "nuget": [ "https://dotnet.myget.org/F/roslyn/api/v2/package" ],
       "vsix": [ "https://dotnet.myget.org/F/roslyn/vsix/upload" ],
-      "channels": [ "dev16.7", "dev16.7p1" ],
-      "vsBranch": "rel/d16.7",
+      "channels": [ "dev16.7", "dev16.7p2" ],
+      "vsBranch": "master",
       "vsMajorVersion": 16
     },
     "master-vs-deps": {
@@ -86,7 +86,7 @@
       "version": "3.7.*",
       "nuget": [ "https://dotnet.myget.org/F/roslyn/api/v2/package" ],
       "vsix": [ "https://dotnet.myget.org/F/roslyn/vsix/upload" ],
-      "channels": [ "dev16.7", "dev16.7p2" ],
+      "channels": [ "dev16.7", "dev16.7p3" ],
       "vsBranch": "master",
       "vsMajorVersion": 16
     },