internal/lsp/debug: set hardcoded version string for pre-release

Change-Id: Ib042847d5ce7fa4171b59d40ae52a6ccbb262e0d
Reviewed-on: https://go-review.googlesource.com/c/tools/+/216301
Reviewed-by: Heschi Kreinick <heschi@google.com>
diff --git a/internal/lsp/debug/info.go b/internal/lsp/debug/info.go
index 3a82a1f..29930e5 100644
--- a/internal/lsp/debug/info.go
+++ b/internal/lsp/debug/info.go
@@ -21,7 +21,7 @@
 )
 
 // Version is a manually-updated mechanism for tracking versions.
-var Version = "master"
+var Version = "0.3.0-pre1"
 
 // PrintServerInfo writes HTML debug info to w for the Instance s.
 func PrintServerInfo(w io.Writer, s Instance) {