release candidate 5.6.0 (#580)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 610a310..0ecfbb4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@
 project(simdutf
   DESCRIPTION "Fast Unicode validation, transcoding and processing"
   LANGUAGES CXX
-  VERSION 5.5.0
+  VERSION 5.6.0
 )
 
 include (TestBigEndian)
@@ -23,8 +23,8 @@
 include(CTest)
 include(cmake/simdutf-flags.cmake)
 
-set(SIMDUTF_LIB_VERSION "10.0.0" CACHE STRING "simdutf library version")
-set(SIMDUTF_LIB_SOVERSION "10" CACHE STRING "simdutf library soversion")
+set(SIMDUTF_LIB_VERSION "11.0.0" CACHE STRING "simdutf library version")
+set(SIMDUTF_LIB_SOVERSION "11" CACHE STRING "simdutf library soversion")
 option(SIMDUTF_TESTS "Whether the tests are included as part of the CMake Build." ON)
 option(SIMDUTF_BENCHMARKS "Whether the benchmarks are included as part of the CMake Build." OFF)
 option(SIMDUTF_TOOLS "Whether the tools are included as part of the CMake build. Requires C++17 or better." ON)
diff --git a/Doxyfile b/Doxyfile
index 0bdee73..dca4b85 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -38,7 +38,7 @@
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = "5.5.0"
+PROJECT_NUMBER         = "5.6.0"
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/README.md b/README.md
index 746d173..c41761a 100644
--- a/README.md
+++ b/README.md
@@ -144,7 +144,7 @@
 
 1. Pull the library in a directory
    ```
-   wget https://github.com/simdutf/simdutf/releases/download/v5.5.0/singleheader.zip
+   wget https://github.com/simdutf/simdutf/releases/download/v5.6.0/singleheader.zip
    unzip singleheader.zip
    ```
    You can replace `wget` by `curl -OL https://...` if you prefer.
@@ -206,7 +206,7 @@
 You can create a single-header version of the library where
 all of the code is put into two files (`simdutf.h` and `simdutf.cpp`).
 We publish a zip archive containing these files, e.g., see
-https://github.com/simdutf/simdutf/releases/download/v5.5.0/singleheader.zip
+https://github.com/simdutf/simdutf/releases/download/v5.6.0/singleheader.zip
 
 You may generate it on your own using a Python script.
 
diff --git a/include/simdutf/simdutf_version.h b/include/simdutf/simdutf_version.h
index 8dcefd3..6cb013b 100644
--- a/include/simdutf/simdutf_version.h
+++ b/include/simdutf/simdutf_version.h
@@ -4,7 +4,7 @@
 #define SIMDUTF_SIMDUTF_VERSION_H
 
 /** The version of simdutf being used (major.minor.revision) */
-#define SIMDUTF_VERSION "5.5.0"
+#define SIMDUTF_VERSION "5.6.0"
 
 namespace simdutf {
 enum {
@@ -15,7 +15,7 @@
   /**
    * The minor version (major.MINOR.revision) of simdutf being used.
    */
-  SIMDUTF_VERSION_MINOR = 5,
+  SIMDUTF_VERSION_MINOR = 6,
   /**
    * The revision (major.minor.REVISION) of simdutf being used.
    */