moving to TAG_VERSION 7.8.4

Author: Robert McLay

src/Version.lua

@@ -1,12 +1,12 @@
 local M={}
-function M.tag()  return "7.8.3"   end
+function M.tag()  return "7.8.4"   end
 function M.git()
    local s = "@git@"
    if (s == "@" .. "git@")     then s = "" end
    if (s == "("..M.tag()..")") then s = "" end
    return s
 end
-function M.date() return "2018-09-11 13:20 -05:00" end
+function M.date() return "2018-09-11 14:01 -05:00" end
 function M.name()
   local a = {}
   a[#a+1] = M.tag()