Update source.md

Nate Smith · web-flow · commit 8a5be0fabfcb · 2020-08-14T09:30:44.000-05:00
diff --git a/docs/source.md b/docs/source.md
@@ -4,7 +4,7 @@
 
    ```sh
    $ go version
-   go version go1.15
+   go version go1.14
    ```
 
    If `go` is not installed, follow instructions on [the Go website](https://golang.org/doc/install).
