[tz] new NIST leap-seconds.list

[Chris Woodbury]

There is a new NIST leap-seconds.list (thanks to Dr. Judah Levine).

diff --git a/leap-seconds.list b/leap-seconds.list
index a1bc5a7..529dc4a 100644
--- a/leap-seconds.list
+++ b/leap-seconds.list
@@ -62,7 +62,7 @@
 #              Terry Quinn, "The BIPM and the Accurate Measurement
 #              of Time," Proc. of the IEEE, Vol. 79, pp. 894-905,
 #              July, 1991. <http://dx.doi.org/10.1109/5.84965>
-#              reprinted in:
+#              reprinted in:
 #                 Christine Hackman and Donald B Sullivan (eds.)
 #                 Time and Frequency Measurement
 #                 American Association of Physics Teachers (1996)
@@ -204,10 +204,10 @@
 #      current -- the update time stamp, the data and the name of the file
 #      will not change.
 #
-#      Updated through IERS Bulletin C58
-#      File expires on:  28 June 2020
+#      Updated through IERS Bulletin C59
+#      File expires on:  28 December 2020
 #
-#@     3802291200
+#@     3818102400
 #
 2272060800     10      # 1 Jan 1972
 2287785600     11      # 1 Jul 1972
@@ -252,4 +252,4 @@
 #      the hash line is also ignored in the
 #      computation.
 #
-#h     f28827d2 f263b6c3 ec0f19eb a3e0dbf0 97f3fa30
+#h     a1c168ae 27c79a7d 9dddcfc3 bcfe616b 2e2c44ea
\ No newline at end of file