Release: bump to v0.2.0 for the next preview

Since v0.1.0 the tree has gained a working Windows XP backend
stack (separate ELFEED2_HTTP_BACKEND=cpp-httplib path, pinned
Mozilla CA bundle embedded into the exe, mbedTLS entropy
retuned through CryptGenRandom, TLS 1.2 cap, Vista+ API shims
in src/xp_shims.hpp), a `p` hotkey / menu item for ad-hoc URL
downloads (clipboard pre-fill with X11/Wayland PRIMARY
fallback, auto-routing between yt-dlp and HTTP-direct), an
empty-Tags-column fix via group_concat, and the preset-vs-
builtin precedence flip so user keybindings stop getting
silently stomped by future built-ins. Enough surface area for
a preview number.

Single line: PROJECT_VERSION is the only source of truth;
ELFEED_VERSION, the Windows VERSIONINFO resource, and the
macOS Info.plist all pick it up from there at configure time.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: skeeto

CMakeLists.txt

@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.25)
-project(elfeed2 VERSION 0.1.0 LANGUAGES C CXX)
+project(elfeed2 VERSION 0.2.0 LANGUAGES C CXX)
 
 # Local CMake modules (helpers + per-dep Fetch<X>.cmake files).
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")