Prepare for release 1.4.0

Signed-off-by: Thomas Lauf <[email protected]>

ChangeLog

@@ -1,4 +1,6 @@
-1.4.0 (2020-08-) -
+------ current release ---------------------------
+
+1.4.0 (2020-08-29) -
 
 - #126    DOM-Query for ids
 - #188    DOM-Query for tags
@@ -34,7 +36,7 @@
 - #372    Empty intervals are not deleted in `:adjust` overlap resolution
           (thanks to xerus2000)
 
------- current release ---------------------------
+------ old releases ------------------------------
 
 1.3.0 (2020-04-19) - 3de53d7599d1e4364c8aaaeb3c3ef1fe89ee3380
 
@@ -69,8 +71,6 @@
           (thanks to Shaun Ruffell, Saulius Krasuckas)
 - #298    Add current version of bash-completion
 
------- old releases ------------------------------
-
 1.2.0 (2019-11-22) 1d271508a27b9d8a5211ae5b01c7a0583ff690fd
 
 - #2      Generate a warning when a new tag is used on the command line