feat: allow basic win32 backslash use

Even though backslashes are not supposed to be used with globs,
glob-parent still did its job of separating out the glob-like
sections prior to escaping functionality being added. This restores
that capability for basic cases. Users will not be able to use
backslashes as their path separator AND escape characters; if
escapes are needed they are responsible for providing their globs
with the appropriate forward-slash separators.

index.js

@@ -3,8 +3,12 @@
 var path = require('path');
 var isglob = require('is-glob');
 var pathDirname = require('path-dirname');
+var isWin32 = require('os').platform() === 'win32';
 
 module.exports = function globParent(str) {
+	// flip windows path separators
+	if (isWin32 && str.indexOf('/') < 0) str = str.split('\\').join('/');
+
 	// special case for strings ending in enclosure containing path separator
 	if (/[\{\[].*[\/]*.*[\}\]]$/.test(str)) str += '/';
 

test.js

@@ -162,3 +162,11 @@ describe('glob2base test patterns', function() {
     assert.equal(gp('ooga/{booga,sooga}/**/dooga/{eooga,fooga}'), 'ooga');
   });
 });
+
+if (require('os').platform() === 'win32') {
+  describe('technically invalid windows globs', function() {
+    it('should manage simple globs with backslash path separator', function() {
+      assert.equal(gp('C:\\path\\*.js'), 'C:/path')
+    });
+  });
+}