Update Node LTS 12 (attempt 2) (#37299)

Second attempt upgrading to Node LTS 12 Erbium.

Original attempt in #37031

- Update root shrinkwrap
- Update app package locks

Author: sirreal

.circleci/config.yml

@@ -9,7 +9,7 @@ references:
     CIRCLE_TEST_REPORTS: /tmp/test_results
 
   docker-image: &docker-image
-    - image: circleci/node:10.16.3-browsers
+    - image: circleci/node:12.13.0-browsers
 
   setup-results-and-artifacts: &setup-results-and-artifacts
     name: Create Directories for Results and Artifacts

.nvmrc

@@ -1 +1 @@
-10.16.3
+12.13.0

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:10.16.3
+FROM node:12.13.0
 LABEL maintainer="Automattic"
 
 WORKDIR    /calypso