update getContent in PDFReader and type definitions #1001

	# commented out for now, we should bring this back when we
	# work on the bundle size

	# name: size
	# on: [pull_request]
	# jobs:
	# size:
	# runs-on: ubuntu-latest
	# env:
	# CI_JOB_NUMBER: 1
	# steps:
	# - uses: actions/checkout@v1
	# - uses: andresz1/size-limit-action@v1
	# with:
	# github_token: ${{ secrets.GITHUB_TOKEN }}

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