Update CocoaPods to 1.16.2

[philipphofmann]

We can't update CocoaPods to 1.16.2 cause it fails with

ERROR | [iOS] unknown: Encountered an unknown error (Unable to locate the executable `rsync`) during validation.

so we had to roll back to 1.14.2. See #570.

We can try adding rsync here and double-check with the docker image locally to see if it works before opening a PR.

craft/Dockerfile

Lines 28 to 42 in 272a995

	RUN apt-get -qq update \
	&& apt-get install -y --no-install-recommends \
	apt-transport-https \
	build-essential \
	curl \
	default-jdk-headless \
	dirmngr \
	gnupg \
	git \
	python3-packaging \
	python3-venv \
	ruby-full \
	jq \
	unzip \
	maven \

[BYK]

@philipphofmann need any help with this?