[core] Enable eager spacebind bindings by default

CHANGELOG.develop

@@ -672,6 +672,7 @@ Other:
     (thanks to Vitor Finotti and Robby O'Connor)
   - Added reference handler as per jump handler (thanks to Fangrui Song)
   - Added =spacemacs/iwb-region-or-buffer= (thanks to bb2020)
+  - Enabled eager spacebind bindings by default
 *** Distribution changes
 - Refactored =spacemacs-bootstrap=, =spacemacs-ui=, and =spacemacs-ui-visual=
   layers:

core/core-spacebind.el

@@ -11,7 +11,7 @@
 
 (require 'core-keybindings)
 
-(defvar spacebind--eager-bind nil
+(defvar spacebind--eager-bind t
   "If true bind keys right after `spacmeacs|spacebind' macro-expanse.
 Otherwise binding happens at the next event loop.")