fix meson build script breaking with meson 0.60.0 (fixes #121)

meson.build

@@ -24,10 +24,10 @@ project(
 #######################################################################################################################
 
 compiler = meson.get_compiler('cpp')
-message(['target cpu_family', host_machine.cpu_family()])
-message(['target cpu', host_machine.cpu()])
-message(['target system', host_machine.system()])
-message(['target endian', host_machine.endian()])
+message('target cpu_family: @0@'.format(host_machine.cpu_family()))
+message('target cpu: @0@'.format(host_machine.cpu()))
+message('target system: @0@'.format(host_machine.system()))
+message('target endian: @0@'.format(host_machine.endian()))
 
 is_gcc = compiler.get_id() == 'gcc'
 is_clang = compiler.get_id() == 'clang'
@@ -46,10 +46,10 @@ include_dirs = include_directories('include', 'external')
 overrides = []
 additional_arguments = []
 
-message(['is_release', is_release])
-message(['is_windows', is_windows])
-message(['is_x64', is_x64])
-message(['has_exceptions', has_exceptions])
+message('is_release: @0@'.format(is_release))
+message('is_windows: @0@'.format(is_windows))
+message('is_x64: @0@'.format(is_x64))
+message('has_exceptions: @0@'.format(has_exceptions))
 
 # compiler argument references:
 # msvc: https://docs.microsoft.com/en-us/cpp/build/reference/compiler-options-listed-alphabetically?view=vs-2019