timestamp is now crashing node-opcua subscriptions via time interval bigger than In32

[biancode]

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Problem

• ( x) bug report => please search GitHub for a similar issue or PR before submitting
• ( ) unexpected behaviour => please visit the Wiki before

Information

Current behaviour

crash on inject with timestamp for listener, because of a new Int32 stream in node-opcua

Expected behaviour

inject with timestamp should not crash node-red, it should set default time interval

Minimal reproduction of the problem with instructions

1. add listener
2. add inject
3. inject timestamp to listener

Your Environment

Please tell us about your environment:

• (x) I am using just the Node-RED package and got node-opcua installed with it

• ( ) I have installed node-opcua global from source (using git clone)

• ( ) I have installed node-opcua as a global package (using npm i -g)

• Device :

  • ( ) macOS: v
  • (x) Linux: v
  • ( ) Windows: v
  • ( ) Raspbian: v
  • ( ) Other:
    • Name:
    • Version: Ubuntu

• Node-RED version: 0.20.2

• node-red-contrib-iiot-opcua version: 3.10.0 ``

• Node: (min. 8.x)
  node --version = 10.15.3

node-opcua version = 0.6.0