GH-48: fix ktlint version retrieval (#51)

Co-authored-by: Ghais Zaher <ghaiszaher@gmail.com>

entrypoint.sh

@@ -34,10 +34,15 @@ git config --global --add safe.directory $GITHUB_WORKSPACE
 export REVIEWDOG_GITHUB_API_TOKEN="${INPUT_GITHUB_TOKEN}"
 
 ktlint_version=$(ktlint --version)
+# In newer ktlint versions, the command `ktlint --version` returns "ktlint version x.y.z" and we need to remove "ktlint version " from the string
+ktlint_version=${ktlint_version#"ktlint version "}
+
 echo "ktlint version: $ktlint_version"
 
+# ktlint_version > 0.49.1
 if [ "$(printf '%s\n' "0.49.1" "$ktlint_version" | sort -V | head -n1)" = "0.49.1" ]; then
   # --code-style is deprecated since 1.0.1 and .editorconfig needs to be used: https://pinterest.github.io/ktlint/latest/rules/code-styles/
+  # ktlint_version <= 1.0.0
   if [ "$(printf '%s\n' "1.0.0" "$ktlint_version" | sort -V | tail -n1)" = "1.0.0" ]; then
     if [ "$INPUT_ANDROID" = true ]; then
       export ANDROID="--code-style=android_studio"