[refactor] refactor and add tests for Center and Confirmation

As a couple of initial, example tests, Center and Confirmation were
refactored and tests were set up and added with mocha, enzyme and
chai. Spinner was also refactored.

1 files changed, 3 insertions, 0 deletions

diff --git a/ui/.babelrc b/ui/.babelrc
new file mode 100644
index 00000000..86c445f5
--- /dev/null
+++ b/ui/.babelrc
@@ -0,0 +1,3 @@
+{
+  "presets": ["es2015", "react"]
+}