doc: Guile 2.2 is needed.

This is a followup to ee11ba1d93. * README: Ask for Guile 2.2.
2019-08-17 18:59:28 +02:00 · 2019-08-17 18:59:28 +02:00 · b1d7e9ddb4
parent c6f4fa5f57
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+++ b/2
@ -6,7 +6,7 @@ Requirements

 Cuirass currently depends on the following packages:

-  - GNU Guile 2.0.9 or later
+  - GNU Guile 2.2.x or later
  - GNU Guix (and all its development dependencies)
  - GNU Make
  - Guile-JSON 3.x