Neo4j parameter syntax deprecated

[szarnyasg]

The syntax

:param { param1: ..., param2: ... }

is now deprecated, see neo4j/neo4j-browser#645. The solution is to drop the curly braces:

:param param1: ..., param2: ...

[szarnyasg]

See https://stackoverflow.com/questions/60575729/how-to-pass-multiple-parameters-to-the-neo4j-browser

[szarnyasg]

Fixed on dev (now the default branch).