Fix Monochrome class with new data structure, unit tests. There is work to be done still

meson.build

@@ -1,7 +1,22 @@
-project('ptprnt', 'cpp',
-    version: 'v0.1.0-'+run_command('git', 'rev-parse',  '--short', 'HEAD', check: true).stdout().strip(),
+project(
+    'ptprnt',
+    'cpp',
+    version: 'v0.1.0-' + run_command(
+        'git',
+        'rev-parse',
+        '--short',
+        'HEAD',
+        check: true,
+    ).stdout().strip(),
     license: 'GPLv3',
-    default_options : ['c_std=c11', 'cpp_std=c++2a', 'b_sanitize=none', 'b_lto=true', 'b_lto_mode=thin', 'b_thinlto_cache=true']    
+    default_options: [
+        'c_std=c11',
+        'cpp_std=c++20',
+        'b_sanitize=none',
+        'b_lto=true',
+        'b_lto_mode=thin',
+        'b_thinlto_cache=true',
+    ],
 )
 
 usb_dep = dependency('libusb-1.0')
@@ -21,13 +36,13 @@ incdir = include_directories('src')
 subdir('src')
 
 ptprnt_exe = executable(
-    'ptprnt', 
+    'ptprnt',
     'src/main.cpp',
     install: true,
-    dependencies : [usb_dep, log_dep, fmt_dep, pangocairo_dep, cli11_dep],
+    dependencies: [usb_dep, log_dep, fmt_dep, pangocairo_dep, cli11_dep],
     include_directories: incdir,
     sources: [ptprnt_srcs],
-    cpp_args : ['-DPROJ_VERSION="'+meson.project_version()+'"'],
+    cpp_args: ['-DPROJ_VERSION="' + meson.project_version() + '"'],
 )
 
 
@@ -40,4 +55,4 @@ if not gtest_dep.found()
     error('MESON_SKIP_TEST: gtest not installed.')
 endif
 
-subdir('tests')
+subdir('tests')