Raise libv8 required version to 6.0.45

Author: pinepain

README.md

@@ -73,7 +73,7 @@ in your IDE and other code-analysis tools.
 ### Requirements
 
 #### V8
-You will need a recent v8 Google JavaScript engine version installed. At this time the extension is tested on 6.0.4.
+You will need a recent v8 Google JavaScript engine version installed. At this time the extension is tested on 6.0.45.
 
 #### PHP
 This extension is PHP7-only. It works and tested with both PHP 7.0 and PHP 7.1.

config.m4

@@ -8,7 +8,7 @@ if test "$PHP_V8" != "no"; then
   SEARCH_PATH="/usr/local /usr"
   SEARCH_FOR="include/v8.h"
 
-  V8_MIN_API_VERSION_STR=6.0.4
+  V8_MIN_API_VERSION_STR=6.0.45
 
   DESIRED_V8_VERSION=`echo "${V8_MIN_API_VERSION_STR}" | $AWK 'BEGIN { FS = "."; } { printf "%s.%s", [$]1, [$]2;}'`