Update dependency nodemon to v3

This MR contains the following updates:

Package	Type	Update	Change
nodemon (source)	devDependencies	major	^2.0.19 -> ^3.0.0

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Release Notes

remy/nodemon (nodemon)

v3.0.1

Compare Source

Bug Fixes

• restore default ext watch behaviour (95bee00), closes #​2124 #​1957

v3.0.0

Compare Source

Bug Fixes

• also watch cjs (86d5f40)
• node@10 support back in (af3b9e2)
• semver vuln dep (6bb8766), closes #​2119

Features

• always use polling on IBM i (3b58104)

BREAKING CHANGES

• official support for node@8 dropped.

However there's no function being used in semver that breaks node 8, so it's technically still possible to run with node 8, but it will no longer be supported (or tested in CI).

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