Initialized a new go module

Via the following command from the project root:
    go mod init

Author: ZapAnton

go.mod

@@ -0,0 +1,26 @@
+module github.com/exercism/cli
+
+require (
+	github.com/blang/semver v3.5.1+incompatible
+	github.com/davecgh/go-spew v1.1.0
+	github.com/fsnotify/fsnotify v1.4.2
+	github.com/hashicorp/hcl v0.0.0-20170509225359-392dba7d905e
+	github.com/inconshreveable/go-update v0.0.0-20160112193335-8152e7eb6ccf
+	github.com/inconshreveable/mousetrap v1.0.0
+	github.com/magiconair/properties v1.7.3
+	github.com/mitchellh/mapstructure v0.0.0-20170523030023-d0303fe80992
+	github.com/pelletier/go-buffruneio v0.2.0
+	github.com/pelletier/go-toml v1.0.0
+	github.com/pmezard/go-difflib v1.0.0
+	github.com/spf13/afero v0.0.0-20170217164146-9be650865eab
+	github.com/spf13/cast v1.1.0
+	github.com/spf13/cobra v0.0.0-20170731170427-b26b538f6930
+	github.com/spf13/jwalterweatherman v0.0.0-20170523133247-0efa5202c046
+	github.com/spf13/pflag v1.0.0
+	github.com/spf13/viper v0.0.0-20180507071007-15738813a09d
+	github.com/stretchr/testify v1.1.4
+	golang.org/x/net v0.0.0-20170726083632-f5079bd7f6f7
+	golang.org/x/sys v0.0.0-20170803140359-d8f5ea21b929
+	golang.org/x/text v0.0.0-20170730040918-3bd178b88a81
+	gopkg.in/yaml.v2 v2.0.0-20170721122051-25c4ec802a7d
+)

go.sum

@@ -0,0 +1,43 @@
+github.com/blang/semver v3.5.1+incompatible h1:cQNTCjp13qL8KC3Nbxr/y2Bqb63oX6wdnnjpJbkM4JQ=
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+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
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+github.com/fsnotify/fsnotify v1.4.2 h1:v5tKwtf2hNhBV24eNYfQ5UmvFOGlOCmRqk7/P1olxtk=
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+github.com/inconshreveable/go-update v0.0.0-20160112193335-8152e7eb6ccf h1:WfD7VjIE6z8dIvMsI4/s+1qr5EL+zoIGev1BQj1eoJ8=
+github.com/inconshreveable/go-update v0.0.0-20160112193335-8152e7eb6ccf/go.mod h1:hyb9oH7vZsitZCiBt0ZvifOrB+qc8PS5IiilCIb87rg=
+github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
+github.com/magiconair/properties v1.7.3 h1:6AOjgCKyZFMG/1yfReDPDz3CJZPxnYk7DGmj2HtyF24=
+github.com/magiconair/properties v1.7.3/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
+github.com/mitchellh/mapstructure v0.0.0-20170523030023-d0303fe80992 h1:W7VHAEVflA5/eTyRvQ53Lz5j8bhRd1myHZlI/IZFvbU=
+github.com/mitchellh/mapstructure v0.0.0-20170523030023-d0303fe80992/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
+github.com/pelletier/go-buffruneio v0.2.0 h1:U4t4R6YkofJ5xHm3dJzuRpPZ0mr5MMCoAWooScCR7aA=
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+github.com/pelletier/go-toml v1.0.0 h1:QFDlmAXZrfPXEF6c9+15fMqhQIS3O0pxszhnk936vg4=
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