patch 8.2.1920: listlbr test fails when run after another test

Problem:    Listlbr test fails when run after another test.
Solution:   Add test separately to list of test targets.
diff --git a/src/testdir/Make_all.mak b/src/testdir/Make_all.mak
index 8568824..364221f 100644
--- a/src/testdir/Make_all.mak
+++ b/src/testdir/Make_all.mak
@@ -416,6 +416,7 @@
 	test_listdict.res \
 	test_listener.res \
 	test_listlbr.res \
+	test_listlbr_utf8.res \
 	test_lua.res \
 	test_makeencoding.res \
 	test_man.res \
diff --git a/src/testdir/test_alot_utf8.vim b/src/testdir/test_alot_utf8.vim
index 11de055..77f5ede 100644
--- a/src/testdir/test_alot_utf8.vim
+++ b/src/testdir/test_alot_utf8.vim
@@ -6,7 +6,6 @@
 
 source test_charsearch_utf8.vim
 source test_expr_utf8.vim
-source test_listlbr_utf8.vim
 source test_mksession_utf8.vim
 source test_regexp_utf8.vim
 source test_source_utf8.vim
diff --git a/src/version.c b/src/version.c
index 2aa5b0d..7031dc5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1920,
+/**/
     1919,
 /**/
     1918,