Prefer `tr` to ${char^^}, which does not work on older bash versions (#303)

* Prefer `tr` to ${char^^}, which does not work on older bash versions

* Update CHANGELOG.md

---------

Co-authored-by: ReFil <31960031+ReFil@users.noreply.github.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/bin/get_version.sh b/bin/get_version.sh
index 6a5007b..aa23e17 100755
--- a/bin/get_version.sh
+++ b/bin/get_version.sh
@@ -5,11 +5,18 @@ date=$(date -u +"%Y%m%d")
 branch=${1:-$(git rev-parse --abbrev-ref HEAD | cut -c1-4)}
 commit=${2:-$(git rev-parse --short HEAD)}
 
+uppercase_char() {
+    local char=$1
+
+    (echo $char | tr '[a-z]' '[A-Z]' 2> /dev/null) || echo "${char^^}"
+}
+
 # Function to transform characters to ZMK key behaviours
 transform_char() {
     local char=$1
+
     if [[ $char =~ [A-Za-z] ]]; then
-        echo "<&kp ${char^^}>, "
+        echo "<&kp $(uppercase_char $char)>, "
     elif [[ $char =~ [0-9] ]]; then
         echo "<&kp N${char}>, "
     elif [ "$char" = "." ]; then