Fix: OSX icu module

.travis.yml

@@ -157,7 +157,7 @@ before_install:
   - |
     if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then 
       brew update
-      brew install icu4c
+      brew upgrade icu4c
     fi
   - |
     if [[ "${GOOS}" != "windows" ]]; then

sqlite3_opt_icu.go

@@ -9,5 +9,7 @@ package sqlite3
 /*
 #cgo LDFLAGS: -licuuc -licui18n
 #cgo CFLAGS: -DSQLITE_ENABLE_ICU
+#cgo darwin CFLAGS: -I/usr/local/opt/icu4c/include
+#cgo darwin LDFLAGS: -L/usr/local/opt/icu4c/lib
 */
 import "C"