Fixing a version conflict in Testing.Abstractions and bumping InternalsAbstractions version to 2.0.0, since I removed some public APIs from it.

src/Microsoft.DotNet.InternalAbstractions/project.json

@@ -1,6 +1,6 @@
 {
   "description": "Abstractions for making code that uses file system and environment testable.",
-  "version": "1.0.1-beta-*",
+  "version": "2.0.0-beta-*",
   "buildOptions": {
     "warningsAsErrors": true,
     "keyFile": "../../tools/Key.snk",

src/Microsoft.Extensions.Testing.Abstractions/project.json

@@ -1,6 +1,6 @@
 {
   "description": "Abstractions for test runners to communicate to a tool, such as Visual Studio.",
-  "version": "1.0.0-featmsbuild-*",
+  "version": "1.0.1-featmsbuild-*",
   "buildOptions": {
     "warningsAsErrors": true,
     "allowUnsafe": true,