Update NEWS for upcoming release

NEWS

 Geany 1.34 (unreleased)
 
+    General
+    * Process files in the order they appear on the command line when
+      generating tags files (Issue#1989, PR#1991).
+
+    Bug fixes
+    * Fix high CPU usage with the Scope plugin (Dimitar Zhekov, Issue#1461).
+    * Fix loading some tags files with format specifier (Issue#1814, PR#1817).
+    * Fix Plugin Manager buttons sometimes getting out of sync, possibly
+      leading to a crash (Issue#1781, PR#1799).
+    * Fix horizontal and page scrolling under GTK3 (PR#1843).
+
+    Interface
+    * Always show icons in the go to symbol popup (PR#1997).
+    * Add a keybinding for "Strip Trailing Spaces" (LarsGit223, Issue#395,
+      PR#1806).
+
+    Editor
+    * Update Scintilla to version 3.10.0 (Issue#1421, PR#1914).
+    * Fix line breaking with multi-byte characters (Issue#1958, PR#1960).
+    * Don't beep when trying to go to the next cursor location in a snippet and
+      there is none (see Issue#1554).
+
+    Filetypes
+    * Markdown: Display bold and italics as such (FMuro, PR#1837).
+    * Python: Update keywords to Python 3.7 (Miro Hrončok, Issue#1351, PR#1894).
+    * PHP: Update tags for PHP 7.2 (Dominic Hopf, PR#1970).
+    * Batch: Use REM as single-line comment marker (Issue#1912, PR#1932).
+
+    Windows
+    * Fix display issues on HiDPI displays (Issue#692, PR#1992).
+
+    API
+    * Add `msgwin_compiler_add_string()`, `msgwin_msg_add_string()`,
+      `msgwin_status_add_string()` (Thomas Martitz, PR#1748).
+    * Add `GeanyObject::key-press` signal allowing plugins to intercept key
+      presses before Geany (Jiří Techet, PR#1829).
+
     Internationalization
     * Updated translations: de, dk, hu, it, ja, pt, sv, uk, ru, zh_CN, zh_TW