Prep for version 1.7.5 (#135)

* README.md: set swig version guideline

* prep for 1.7.5

* README.md: update swig version guideline

README.md

@@ -70,7 +70,7 @@ For btllib developers
 
 The following are all the available `ninja` commands which can be run within `build` directory:
 - `ninja clang-format` formats the whitespace in code (requires clang-format 8+).
-- `ninja wrap` wraps C++ code for Python (requires SWIG 4.0+).
+- `ninja wrap` wraps C++ code for Python (requires SWIG ≥4.0 and <4.3).
 - `ninja clang-tidy` runs clang-tidy on C++ code and makes sure it passes (requires clang-tidy 8+).
 - `ninja` builds the tests and wrapper libraries / makes sure they compile.
 - `ninja test` runs the tests.

meson.build

@@ -1,5 +1,5 @@
 project('btllib', 'cpp',
-        version : '1.7.4',
+        version : '1.7.5',
         license : 'GPL3',
         default_options : [ 'cpp_std=c++17', 'warning_level=3', 'werror=true', 'b_coverage=true' ],
         meson_version : '>= 0.60.0')