check for unicode on windows using GetConsoleCP. see #130.

lib/tput.js

@@ -2020,7 +2020,7 @@ Tput.prototype.detectUnicode = function() {
     + ':' + process.env.LC_ALL
     + ':' + process.env.LC_CTYPE;
 
-  return /utf-?8/i.test(LANG);
+  return /utf-?8/i.test(LANG) || (this.GetConsoleCP() === 65001);
 };
 
 // For some reason TERM=linux has smacs/rmacs, but it maps to `^[[11m`
@@ -2130,6 +2130,27 @@ Tput.prototype.parseACS = function(info) {
   return data;
 };
 
+Tput.prototype.GetConsoleCP = function() {
+  var ccp;
+
+  if (process.platform !== 'win32') {
+    return -1;
+  }
+
+  try {
+    ccp = cp.execFileSync(process.env.WINDIR + '\\system32\\chcp.exe', [], {
+      stdio: 'pipe',
+      encoding: 'ascii'
+    });
+  } catch (e) {
+    ;
+  }
+
+  if (!ccp) ccp = '-1';
+
+  return +ccp.trim();
+};
+
 /**
  * Helpers
  */