bump to node 20 and update dependencies

[DaveDarsa]

No description provided.

[tobybellwood]

@DaveDarsa can we get a rebase on this 😄

[tobybellwood]

noting here the reduction in vulnerabilities in this update:

  ## Overview
  
                      │               Analyzed Image               │              Comparison Image               
  ────────────────────┼────────────────────────────────────────────┼─────────────────────────────────────────────
    Target            │  uselagoon/ui:pr-215                       │  uselagoon/ui:core-v2.17.0                  
      digest          │  c2e645347ce0                              │  90aa5beb6a70                               
      platform        │ linux/amd64                                │ linux/amd64                                 
      provenance      │ https://github.com/uselagoon/lagoon-ui     │ https://github.com/uselagoon/lagoon-ui      
                      │  0a8addb991014a60d3a244418bab67eb65276f40  │  8cff1752eec6c138396ccb668709deee2819a494   
      vulnerabilities │    0C     2H     8M     2L     1?          │   10C    50H    43M     3L     2?           
                      │   -10    -48    -35     -1     -1          │                                             
      size            │ 284 MB (+55 MB)                            │ 229 MB                                      
      packages        │ 2159 (+196)                                │ 1963                                        
                      │                                            │                                             
    Base image        │  node:20-alpine                            │  node:16-alpine                             
      tags            │ also known as                              │ also known as                               
                      │   • 20-alpine3.19                          │                                             
                      │   • 20.11-alpine                           │                                             
                      │   • 20.11-alpine3.19                       │                                             
                      │   • iron-alpine                            │                                             
                      │   • iron-alpine3.19                        │                                             
                      │   • lts-alpine                             │                                             
                      │   • lts-alpine3.19                         │                                             
      vulnerabilities │    0C     0H     1M     0L                 │    0C     1H     5M     0L     1?  
      ```

[tobybellwood]

Nice win, easy modernisation