updated dependencies, using go.mod now

vendor/github.com/pressly/chi/.gitignore

@@ -0,0 +1,3 @@
+.idea
+*.sw?
+.vscode

vendor/github.com/pressly/chi/.travis.yml

@@ -0,0 +1,14 @@
+language: go
+
+go:
+  - 1.7.4
+  - tip
+
+install:
+  - go get -u golang.org/x/tools/cmd/goimports
+
+script:
+  - go get -d -t ./...
+  - go test ./...
+  - >
+    goimports -d -e ./ | grep '.*' && { echo; echo "Aborting due to non-empty goimports output."; exit 1; } || :