ci: Add CI step to check for draftlog #368

Job	Run time
install-and-cibuild	30s
detect-changes	1m 23s
flaky-no-gl-jasmine	0s
noci-jasmine	0s
webgl-jasmine	0s
virtual-webgl-jasmine	0s
make-exports	0s
make-baselines	0s
no-gl-jasmine	0s
bundle-jasmine	0s
mathjax-firefoxLatest	0s
make-baselines-mathjax3	0s
webgl-jasmine-chromeLatest	0s
mock-validation	0s
source-syntax	0s
make-baselines-b64	0s
test-baselines-mathjax3	0s
make-baselines-virtual-webgl	0s
test-baselines	0s
test-exports	0s
timezone-jasmine	0s
test-baselines-virtual-webgl	0s
test-baselines-b64	0s
check-regl-codegen	-1s
test-topojson-build	-1s
test-stackgl-bundle	-1s
	1m 50s

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