vendor: update buildkit with typed errors support

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/github.com/opentracing/opentracing-go/.travis.yml

@@ -1,15 +1,20 @@
 language: go
 
-go:
-  - 1.6.x
-  - 1.7.x
-  - 1.8.x
-  - 1.9.x
-  - tip
+matrix:
+  include:
+  - go: "1.13.x"
+  - go: "1.14.x"
+  - go: "tip"
+    env:
+    - LINT=true
+    - COVERAGE=true
 
 install:
-  - go get -d -t github.com/opentracing/opentracing-go/...
-  - go get -u github.com/golang/lint/...
+  - if [ "$LINT" == true ]; then go get -u golang.org/x/lint/golint/... ; else echo 'skipping lint'; fi
+  - go get -u github.com/stretchr/testify/...
+
 script:
-  - make test lint
+  - make test
   - go build ./...
+  - if [ "$LINT" == true ]; then make lint ; else echo 'skipping lint'; fi
+  - if [ "$COVERAGE" == true ]; then make cover && bash <(curl -s https://codecov.io/bash) ; else echo 'skipping coverage'; fi