chore: improve meson build

meson.build

@@ -25,11 +25,15 @@ tgbot_lib = library(
   install: true,
 )
 
-# Example (windows)
+tgbot_dep = declare_dependency(
+  link_with: tgbot_lib,
+  include_directories: inc_dir,
+  dependencies: deps,
+)
+
+# Example
 executable(
   'example',
   'examples/echobot/echobot.c',
-    dependencies: deps,
+  dependencies: tgbot_dep,
-    link_with: tgbot_lib,
-    include_directories: inc_dir,
 )