vendor: Update vendored sources to igraph/igraph@ccbbe37

chore: bump VERSION property in shared library
tests: eliminate som undesirable uses of abort() in tests Refs igraph/igraph#2847

Author: krlmlr

src/vendor/cigraph/src/CMakeLists.txt

@@ -337,7 +337,7 @@ add_library(
 add_dependencies(igraph parsersources)
 
 # Set soname for the library
-set_target_properties(igraph PROPERTIES VERSION "3.1.10")
+set_target_properties(igraph PROPERTIES VERSION "3.1.11")
 set_target_properties(igraph PROPERTIES SOVERSION 3)
 
 # Add extra compiler definitions if needed

src/vendor/igraph_version.h

@@ -28,11 +28,11 @@
 
 __BEGIN_DECLS
 
-#define IGRAPH_VERSION "0.10.16-167-ga4c6be577"
+#define IGRAPH_VERSION "0.10.16-169-gccbbe3733"
 #define IGRAPH_VERSION_MAJOR 0
 #define IGRAPH_VERSION_MINOR 10
 #define IGRAPH_VERSION_PATCH 16
-#define IGRAPH_VERSION_PRERELEASE "167-ga4c6be577"
+#define IGRAPH_VERSION_PRERELEASE "169-gccbbe3733"
 
 IGRAPH_EXPORT void igraph_version(const char **version_string,
                                   int *major,