grunt 1.5.3

on Node.js NPM

• Merge pull request #1745 from gruntjs/fix-copy-op 572d79b
• Patch up race condition in symlink copying. 58016ff
• Merge pull request #1746 from JamieSlome/patch-1 0749e1d
• Create SECURITY.md 69b7c50

v1.5.2...v1.5.3