THRIFT-5358: Add go.mod file to root directory
Client: go
This unblocks the development under go 1.16+, which starts to complain
when there's no go.mod file in any of the directories.
The current approach is certainly not the best solution ever, for
example it does not run the tests under lib/go/test/tests but copy them
into lib/go/test/gopath/src/sometest and run them there instead, but
those improvements can be done in the future in follow up PRs and this
should be a good enough first step to unblock developments.
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..474ec99
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module github.com/apache/thrift
+
+go 1.15
+
+require github.com/golang/mock v1.5.0