README: update required bash version

Bash 5 was recently released, so the bash 4 requirement is misleading.
Additionally, we also depend on some features in bash 4.2.

Signed-off-by: Omar Sandoval <osandov@fb.com>

diff --git a/README.md b/README.md
index 05afb8d402b7fd42cc09d1f81090447081a9f732..069084092db9f271e36c94cc1a622ff8c747f7e5 100644 (file)
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ filesystem testing framework.
 
 The dependencies are minimal, but make sure you have them installed:
 
-- bash 4
+- bash (>= 4.2)
 - GNU coreutils
 - GNU awk
 - util-linux