PMM-4781 Change version to 1.5.0 because of bug in the package.

See: Masterminds/semver#125.

Gopkg.toml

@@ -9,4 +9,4 @@
 
 [[constraint]]
   name = "github.com/Masterminds/semver"
-  version = "3.0.1"
+  version = "1.5.0"

go.mod

@@ -3,7 +3,7 @@ module github.com/percona/mongodb_exporter
 go 1.12
 
 require (
-	github.com/Masterminds/semver/v3 v3.0.1 // indirect
+	github.com/Masterminds/semver v1.5.0
 	github.com/andreyvit/diff v0.0.0-20170406064948-c7f18ee00883
 	github.com/golang/snappy v0.0.1 // indirect
 	github.com/google/go-cmp v0.3.0 // indirect

go.sum

@@ -1,5 +1,5 @@
-github.com/Masterminds/semver/v3 v3.0.1 h1:2kKm5lb7dKVrt5TYUiAavE6oFc1cFT0057UVGT+JqLk=
-github.com/Masterminds/semver/v3 v3.0.1/go.mod h1:VPu/7SZ7ePZ3QOrcuXROw5FAcLl4a0cBrbBpGY/8hQs=
+github.com/Masterminds/semver v1.5.0 h1:H65muMkzWKEuNDnfl9d70GUjFniHKHRbFPGBuZ3QEww=
+github.com/Masterminds/semver v1.5.0/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc h1:cAKDfWh5VpdgMhJosfJnn5/FoN2SRZ4p7fJNX58YPaU=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf h1:qet1QNfXsQxTZqLG4oE62mJzwPIB8+Tee4RNCL9ulrY=