Rev version to 0.8.0

Author: brendandburns

version.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://raw.githubusercontent.com/AArnott/Nerdbank.GitVersioning/master/src/NerdBank.GitVersioning/version.schema.json",
-  "version": "0.7.0-beta",
+  "version": "0.8.0-beta",
   "publicReleaseRefSpec": [
     "^refs/heads/master$", // we release out of master
   ],
-}
+}