chore(deps): update dependency org.json:json to v20200518

[renovate]

This PR contains the following updates:

Package	Update	Change
org.json:json	major	20190722 -> 20200518

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Release Notes

douglascrockford/JSON-java

v20200518

Compare Source

Pull Request	Description
#​502	Update JSONTokener text in README
#​499	Add copyright to some files
#​495	Refactor typos from code
#​494	Replace JSONObject constructor string arrays with var args
#​492	Clarify output of JSONArray toList()
#​486	Standardize some exception messages
#​485	Fix EOF error when Meta tag isn't closed at end of input.
#​483	Update README.md to point to latest released jar
#​481	Clarify exception when parser reads JSON
#​475	Make private methods static where possible
#​474	Replaces an internally used inefficient StringBuffer class

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