[strscan] Version 3.0.0

https://github.com/ruby/strscan/commit/08645e4e77

ext/strscan/strscan.c

@@ -22,7 +22,7 @@ extern size_t onig_region_memsize(const struct re_registers *regs);
 
 #include <stdbool.h>
 
-#define STRSCAN_VERSION "1.0.4"
+#define STRSCAN_VERSION "3.0.0"
 
 /* =======================================================================
                          Data Type Definitions

ext/strscan/strscan.gemspec

@@ -1,7 +1,18 @@
 # frozen_string_literal: true
+#
+source_version = ["", "ext/strscan/"].find do |dir|
+  begin
+    break File.open(File.join(__dir__, "#{dir}strscan.c")) {|f|
+      f.gets("\n#define STRSCAN_VERSION ")
+      f.gets[/\s*"(.+)"/, 1]
+    }
+  rescue Errno::ENOENT
+  end
+end
+
 Gem::Specification.new do |s|
   s.name = "strscan"
-  s.version = "1.0.4"
+  s.version = source_version
   s.summary = "Provides lexical scanning operations on a String."
   s.description = "Provides lexical scanning operations on a String."