meson: build version to 0.106.1

meson: build version to 0.106

nm:parse-nm: handle differing ip6-privacy default value (canonical#263)

Commit 64e381e (canonical#244) changed netplan's
behaviour to always write out the ipv6-privacy value (default to 0=off),
in order to comply with what is written in our documentation and how it is
implemented in the networkd backend.

This is a problem for our NetworkManager integration, as NM's default value
is -1=unknown. Netplan only supports values 0=off and 2=on while NM supports
-1, 0, 1 and 2. We need to handle unsupported cases (-1 and 1) via passthrough.

cli: Fix failure with "set-name" and "bridges" (canonical#221)

The code path when a config has set-name as well as bridges doesn't seem to work at present, failure below. This change seems to fix it.

Config:
```
network:
  version: 2
#  renderer: networkd
#  networkd doesn't handle ethernet well...
  renderer: NetworkManager
  ethernets:
    devnet:
      renderer: networkd
      match:
        name: enx00aa11223344
    enx00bb11223344:
      addresses: [ 10.20.0.1/24 ]
      renderer: networkd
    wlan:
      match:
        macaddress: 00:99:11:22:33:44
      set-name: "wlan0"

  bridges:
    # ... and NetworkManager doesn't handle bridges well
    renderer: networkd
    br0:
      addresses: [ "10.9.0.1/16" ]
      interfaces: [ "devnet" ]
```
Failure:
```
netplan try
Traceback (most recent call last):
  File "/usr/share/netplan/netplan/cli/commands/try_command.py", line 84, in command_try
    NetplanApply().command_apply(run_generate=True, sync=True, exit_on_error=False)
  File "/usr/share/netplan/netplan/cli/commands/apply.py", line 191, in command_apply
    changes = NetplanApply.process_link_changes(devices, config_manager)
  File "/usr/share/netplan/netplan/cli/commands/apply.py", line 281, in process_link_changes
    if NetplanApply.is_composite_member(composite_interfaces, phy):
  File "/usr/share/netplan/netplan/cli/commands/apply.py", line 252, in is_composite_member
    members = settings.get('interfaces', [])
AttributeError: 'str' object has no attribute 'get'
```

COMMITS:
* cli: Fix handling "set-name" with composites
* tests: add CLI unittests
Co-authored-by: Lukas Märdian <slyon@ubuntu.com>

Releasing version 0.98

parser: refactor / factor out validation and error reporting

Move validation and error reporting to their own files; also rework
the validation passes slightly to validate as much as we can of the
netplan grammar in parser passes (so we get context info for errors),
and leave the backend rules sanity checking only to after the parsing.

This way we'll get the error context, unless things are backend-specific
rules for which it's just hard to get the info (and not as helpful).

Fix failure in make install

Release netplan.io 0.96

tagging package netplan.io version 0.95

tagging package netplan.io version 0.90