grep parameter macos compatible

Author: nicolaasuni

Makefile

@@ -56,7 +56,7 @@ endif
 
 # Common commands
 GO=GOPATH=$(GOPATH) GOPRIVATE=$(CVSPATH) $(shell which go)
-GOVERSION=${shell go version | grep -Po '(go[0-9]+.[0-9]+)'}
+GOVERSION=${shell go version | grep -Eo '(go[0-9]+.[0-9]+)'}
 GOFMT=$(shell which gofmt)
 GOTEST=$(GO) test
 GODOC=GOPATH=$(GOPATH) $(shell which godoc)

VERSION

@@ -1 +1 @@
-1.0.60
+1.0.61