dev-octave/strings: add 1.2.0_p20211128, drop 1.2.0

Signed-off-by: Alessandro Barbieri <lssndrbarbieri@gmail.com>

dev-octave/strings/files/strings-1.2.0-158.patch

@@ -0,0 +1,17 @@
+changeset:   158:2db1dbb75557
+user:        John Donoghue
+date:        Thu Jan 09 16:38:52 2020 -0500
+summary:     * inst/base64encode.m: dont use depreciated toascii
+
+--- a/inst/base64encode.m
++++ b/inst/base64encode.m
+@@ -46,7 +46,7 @@
+   endif
+   
+   if (ischar (X))
+-    X = toascii (X);
++    X = double (X);
+   endif
+   
+   if (any (X != fix (X)) || any (X < 0 | X > 255))
+