v4.0.0: Generate less nodes

Generate less nodes (76520c4)

• if a record has no localized fields, only one node is created with locale = main locale (the first one in project settings)
• if a record has some localized fields, but the "All locales required" option is not active for the model, nodes are generated only for locales for which the record provides content.

v3.0.19...v4.0.0

v4.0.0-0

• Generate less nodes df62ac0
• Bump efd9bb5

v3.0.19...v4.0.0-0

v3.0.19

• Fix Gatsby CMS Preview 2c72e4d

v3.0.19-1...v3.0.19

v3.0.19-3

• wip f14a102

v3.0.19-1...v3.0.19-3

v3.0.19-1

• wip 3c3fc80
• Small refactor 2b4e873
• Bump e2876a7

v3.0.19-0...v3.0.19-1

v3.0.19-0

• Fix Gatsby Preview with nested blocks c957c12
• Bump 6875c58

v3.0.18-0...v3.0.19-0

v3.0.18

Fix Gatsby Preview with nested blocks

v3.0.18-0

• Only load data once in createSchemaCustomization 376bdfe
• Format 32be021
• Bump 323aeb7

v3.0.17...v3.0.18-0

v3.0.17

• Fix tests 1c36ec9
• Upgrade datocms-client 0d6ef07

v3.0.17-0...v3.0.17

v3.0.17-0

• Fix tests 9990e8b
• yarn install dbd187c
• Force version 75809d4
• Bump 50c46a3

v3.0.16...v3.0.17-0