Bump Helm to v2.10.0

Ran `glide update` and `glide install --strip-vendor`, followed by manual changes to `glide.lock` to revert `k8s.io/*` pkg versions to those seen in helm's glide.lock https://github.com/helm/helm/blob/cc7cc1087f586f64d0b0d08aa516a003ced2d85b/glide.lock#L457 to avoid build errors.

Resolves #81

Author: mumoshu

glide.lock

@@ -5,8 +5,17 @@ import:
 - package: github.com/spf13/pflag
   version: 583c0c0531f06d5278b7d917446061adc344b5cd
 - package: k8s.io/helm
-  version: v2.9.0
-#taken from k8s.io/helm hlide.yaml
+  version: v2.10.0
+  subpackages:
+  - pkg/downloader
+  - pkg/getter
+  - pkg/helm/environment
+  - pkg/helm/helmpath
+  - pkg/nstrvals
+  - pkg/helm
+  - pkg/tlsutil
+  - pkg/proto/hapi/release
+#taken from k8s.io/helm glide.yaml
 - package: k8s.io/api
   version: release-1.10
 - package: k8s.io/apimachinery

glide.yaml

@@ -1,7 +1,7 @@
 name: "diff"
 # Version is the version of Helm plus the number of official builds for this
 # plugin
-version: "2.9.0+2"
+version: "2.10.0+1"
 usage: "Preview helm upgrade changes as a diff"
 description: "Preview helm upgrade changes as a diff"
 useTunnel: true