[bindgen] Upgraded eslint plugins + adding prettier as a dep

[kraenhansen]

What, How & Why?

This upgrades two dependencies of the bindgen package and adds a missing dependency.

☑️ ToDos

• 📝 Changelog update
• 🚦 Tests (or not relevant)
• C-API, if public C++ API changed
• bindgen/spec.yml, if public C++ API changed

[coveralls-official]

Pull Request Test Coverage Report for Build kraen.hansen_51

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 96 unchanged lines in 16 files lost coverage.
• Overall coverage decreased (-0.01%) to 91.828%

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Files with Coverage Reduction	New Missed Lines	%
test/test_index_string.cpp	1	94.13%
src/realm/object-store/shared_realm.cpp	2	93.03%
src/realm/query_expression.hpp	2	93.59%
src/realm/sync/noinst/server/server_history.cpp	2	67.94%
src/realm/sync/client.cpp	3	91.1%
test/test_util_network.cpp	3	97.2%
src/realm/sync/noinst/client_reset.cpp	4	92.96%
src/realm/util/assert.hpp	4	87.1%
src/realm/index_string.cpp	6	87.87%
src/realm/sync/network/network.cpp	6	89.46%

Totals
Change from base Build 1994:	-0.01%
Covered Lines:	235169
Relevant Lines:	256096

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💛 - Coveralls