set up go module for _examples/versions (#948)

Author: hongkuancn

_examples/versions/go.mod

@@ -0,0 +1,10 @@
+module versions
+
+go 1.16
+
+require (
+	github.com/go-chi/chi/v5 v5.1.0
+	github.com/go-chi/render v1.0.3
+)
+
+require github.com/ajg/form v1.5.1 // indirect

_examples/versions/go.sum

@@ -0,0 +1,6 @@
+github.com/ajg/form v1.5.1 h1:t9c7v8JUKu/XxOGBU0yjNpaMloxGEJhUkqFRq0ibGeU=
+github.com/ajg/form v1.5.1/go.mod h1:uL1WgH+h2mgNtvBq0339dVnzXdBETtL2LeUXaIv25UY=
+github.com/go-chi/chi/v5 v5.1.0 h1:acVI1TYaD+hhedDJ3r54HyA6sExp3HfXq7QWEEY/xMw=
+github.com/go-chi/chi/v5 v5.1.0/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=
+github.com/go-chi/render v1.0.3 h1:AsXqd2a1/INaIfUSKq3G5uA8weYx20FOsM7uSoCyyt4=
+github.com/go-chi/render v1.0.3/go.mod h1:/gr3hVkmYR0YlEy3LxCuVRFzEu9Ruok+gFqbIofjao0=