Merge pull request #828 from pganssle/release_2.7.4

Update NEWS with changes for 2.7.4

NEWS

+Version 2.7.4 (2018-10-24)
+==========================
+
+Data updates
+------------
+
+- Updated tzdata version to 2018f.
+
+
 Version 2.7.3 (2018-05-09)
 ==========================
 

requirements-dev.txt

@@ -2,7 +2,8 @@
 pytest >= 3.0; python_version != '3.3'
 pytest <  3.3; python_version == '3.3'
 pytest-cov >= 2.0.0
-freezegun
+freezegun < 0.3.11; python_version == '3.3'
+freezegun ; python_version != '3.3'
 hypothesis >= 3.30
 coverage
 mock ; python_version < '3.0'

zonefile_metadata.json

@@ -4,9 +4,9 @@
         "https://dateutil.github.io/tzdata/tzdata/",
         "ftp://ftp.iana.org/tz/releases/"
     ],
-    "tzdata_file": "tzdata2018e.tar.gz",
-    "tzdata_file_sha512": "d059fcd381b2f6ecdafcd68fdd2a00451d1bf9b1affeb164ae7cabca2e022d499e77f0706ec3f3091b8e84c2211aa66da6c90937108771f1bf070cfebc105cae",
-    "tzversion": "2018e",
+    "tzdata_file": "tzdata2018f.tar.gz",
+    "tzdata_file_sha512": "f876729419d45e2b861e564ec7d5940f34fab38c3fedc18852bb800010428c12506f71bde1f20feb23859065118ad4658d97efe89af6f4305cea2beafc515aeb",
+    "tzversion": "2018f",
     "zonegroups": [
         "africa",
         "antarctica",