tech(build): move dependencies to vendor folder

vendor/github.com/bmizerany/assert/example/point.go

@@ -0,0 +1,5 @@
+package point
+
+type Point struct {
+	X, Y int
+}

vendor/github.com/bmizerany/assert/example/point_test.go

@@ -0,0 +1,13 @@
+package point
+
+import (
+	"testing"
+	"assert"
+)
+
+func TestAsserts(t *testing.T) {
+	p1 := Point{1, 1}
+	p2 := Point{2, 1}
+
+	assert.Equal(t, p1, p2)
+}