Update package version to 3.1.1

.gitignore

@@ -1,2 +1,3 @@
-# Exclude bpm archives
+# Ignore BPM archives and signatures
 *.bpm
+*.bpm.sig

info.yml

@@ -1,7 +1,7 @@
 name: zxing-cpp
 description: C++ port of ZXing
-version: 3.0.1
-revision: 2
+version: 3.1.1
+revision: 1
 url: https://github.com/zxing-cpp/zxing-cpp
 license: Apache-2.0
 maintainers:
@@ -26,4 +26,4 @@ downloads:
   - url: https://github.com/zxing-cpp/zxing-cpp/archive/refs/tags/v${BPM_PKG_VERSION}.tar.gz
     extract_to: ${BPM_SOURCE}
     extract_strip_components: 1
-    checksum: de58cf0f49d5947616266b80c12d67b799af6de65ed2f2027a4e8dd418b3bd97
+    checksum: 7286b1e6ade66fe82b7c8208b4595deeb55d6486b410834fdc65702f46650542

recipe.sh

@@ -1,4 +1,4 @@
-# This is the source.sh script. It is executed by BPM in a temporary directory when compiling a source package
+# This is the recipe.sh script. It is executed by BPM in a temporary directory when compiling a source package
 # BPM Expects the source code to be extracted into the automatically created 'source' directory which can be accessed using $BPM_SOURCE
 # BPM Expects the output files to be present in the automatically created 'output' directory which can be accessed using $BPM_OUTPUT