Revert "updated to utf8proc v2.0.1, gives support for Unicode 9"

This reverts commit 10359ec.

MSVC doesn't understand -Wmissing-prototypes

base/strings/utf8proc.jl

@@ -184,12 +184,6 @@ end
 isgraphemebreak(c1::Char, c2::Char) =
     ccall(:utf8proc_grapheme_break, Bool, (UInt32, UInt32), c1, c2)
 
-# Stateful grapheme break required by Unicode-9 rules: the string
-# must be processed in sequence, with state initialized to Ref{Int32}(0).
-# Requires utf8proc v2.0 or later.
-isgraphemebreak(c1::Char, c2::Char, state::Ref{Int32}) =
-    ccall(:utf8proc_grapheme_break_stateful, Bool, (UInt32, UInt32, Ref{Int32}), c1, c2, state)
-
 immutable GraphemeIterator{S<:AbstractString}
     s::S # original string (for generation of SubStrings)
 end
@@ -200,30 +194,28 @@ eltype{S}(::Type{GraphemeIterator{S}}) = SubString{S}
 function length(g::GraphemeIterator)
     c0 = Char(0x00ad) # soft hyphen (grapheme break always allowed after this)
     n = 0
-    state = Ref{Int32}(0)
     for c in g.s
-        n += isgraphemebreak(c0, c, state)
+        n += isgraphemebreak(c0, c)
         c0 = c
     end
     return n
 end
 
-start(g::GraphemeIterator) = (start(g.s), Ref{Int32}(0))
-done(g::GraphemeIterator, i) = done(g.s, i[1])
+start(g::GraphemeIterator) = start(g.s)
+done(g::GraphemeIterator, i) = done(g.s, i)
 
-function next(g::GraphemeIterator, i_)
+function next(g::GraphemeIterator, i)
     s = g.s
-    i, state = i_
     j = i
     c0, k = next(s, i)
     while !done(s, k) # loop until next grapheme is s[i:j]
         c, ℓ = next(s, k)
-        isgraphemebreak(c0, c, state) && break
+        isgraphemebreak(c0, c) && break
         j = k
         k = ℓ
         c0 = c
     end
-    return (SubString(s, i, j), (k, state))
+    return (SubString(s, i, j), k)
 end
 
 ==(g1::GraphemeIterator, g2::GraphemeIterator) = g1.s == g2.s

deps/utf8proc.version

@@ -1,2 +1,2 @@
-UTF8PROC_BRANCH=v2.0.2
-UTF8PROC_SHA1=e3a5ed7b8bb5d0c6bb313d3e1f4d072c04113c4b
+UTF8PROC_BRANCH=v1.3
+UTF8PROC_SHA1=85789180158ac7fff85b9f008828d6ac44f072ea