run checks and build steps in parallel

[jakubgs]

By running Lint and Test stages in parallel to build stages we lose ~4 min on ever build.

Full manual build in 17 min, compared to usual ~24 of a nightly:
https://ci.status.im/job/status-react/job/manual/354/

[status-github-bot]

Pull Request Checklist

• Have you updated the documentation, if impacted (e.g. docs.status.im)?

[status-im-auto]

Jenkins Builds

Click to see older builds (6)

❔	Commit	#️⃣	Finished (UTC)	Duration	Platform	Result
❌	ea8a2a9	#1	2019-06-07 17:33:12	~3 min	linux	📄 log
❌	ea8a2a9	#1	2019-06-07 17:40:42	~10 min	windows	📄 log
✔️	ea8a2a9	#1	2019-06-07 17:42:12	~12 min	android	📦 apk
✔️	ea8a2a9	#1	2019-06-07 17:43:14	~13 min	ios	📦 ipa
✔️	ea8a2a9	#1	2019-06-07 17:45:09	~15 min	macos	📦 dmg
✔️	ea8a2a9	#1	2019-06-07 17:47:25	~17 min	android-e2e	📦 apk

❔	Commit	#️⃣	Finished (UTC)	Duration	Platform	Result
✔️	489544e	#2	2019-06-07 20:22:11	~11 min	android-e2e	📦 apk
✔️	489544e	#2	2019-06-07 20:22:15	~11 min	windows	📦 exe
✔️	489544e	#2	2019-06-07 20:23:05	~12 min	android	📦 apk
✔️	489544e	#2	2019-06-07 20:23:19	~13 min	ios	📦 ipa
✔️	489544e	#2	2019-06-07 20:24:44	~14 min	linux	📦 App
✔️	489544e	#2	2019-06-07 20:26:21	~16 min	macos	📦 dmg
✔️	18f6935	#3	2019-06-09 14:19:22	~11 min	android	📦 apk
✔️	18f6935	#3	2019-06-09 14:20:58	~13 min	macos	📦 dmg
✔️	18f6935	#3	2019-06-09 14:21:27	~13 min	ios	📦 ipa
✔️	18f6935	#3	2019-06-09 14:22:37	~15 min	android-e2e	📦 apk
✔️	18f6935	#3	2019-06-09 14:30:37	~23 min	windows	📦 exe
✔️	18f6935	#3	2019-06-09 14:31:32	~24 min	linux	📦 App

[jakubgs]

When a build appears longer than others, that's because retarded Jenkins adds the time the builds waits for an executor(host) to the duration time. Makes no sense whatsoever, but ah well.