Manually define dependency license metadata that was not detected

The "Licensed" dependency license checker tool uses the licensee tool to automatically determine the license type based
on metadata provided by the dependency author. This must be in a standardized format without any modifications. In cases
where that wasn't done, it is necessary to determine the license type and update the dependency license metadata cache in
the `.licenses` folder manually.

The Licensed tool will check this data whenever the dependency version is updated to make sure the license hasn't changed.

Author: per1234

.licenses/serial-monitor/go/github.com/arduino/go-paths-helper.dep.yml

@@ -4,7 +4,7 @@ version: v1.6.1
 type: go
 summary: 
 homepage: https://pkg.go.dev/github.com/arduino/go-paths-helper
-license: gpl-2.0
+license: gpl-2.0-or-later
 licenses:
 - sources: LICENSE
   text: |2

.licenses/serial-monitor/go/github.com/arduino/go-properties-orderedmap.dep.yml

@@ -4,7 +4,7 @@ version: v1.6.0
 type: go
 summary: Package properties is a library for handling maps of hierarchical properties.
 homepage: https://pkg.go.dev/github.com/arduino/go-properties-orderedmap
-license: gpl-2.0
+license: gpl-2.0-or-later
 licenses:
 - sources: LICENSE
   text: |2

.licenses/serial-monitor/go/github.com/arduino/pluggable-monitor-protocol-handler.dep.yml

@@ -7,7 +7,7 @@ summary: Package monitor is a library for handling the Arduino Pluggable-Monitor
   The library implements the state machine and the parsing logic to communicate with
   a pluggable-monitor client.
 homepage: https://pkg.go.dev/github.com/arduino/pluggable-monitor-protocol-handler
-license: other
+license: gpl-3.0-only
 licenses:
 - sources: LICENSE.txt
   text: |

.licenses/serial-monitor/go/golang.org/x/sys/internal/unsafeheader.dep.yml

@@ -5,7 +5,7 @@ type: go
 summary: Package unsafeheader contains header declarations for the Go runtime's slice
   and string implementations.
 homepage: https://pkg.go.dev/golang.org/x/sys/internal/unsafeheader
-license: other
+license: bsd-3-clause
 licenses:
 - sources: sys@v0.0.0-20210823070655-63515b42dcdf/LICENSE
   text: |

.licenses/serial-monitor/go/golang.org/x/sys/unix.dep.yml

@@ -4,7 +4,7 @@ version: v0.0.0-20210823070655-63515b42dcdf
 type: go
 summary: Package unix contains an interface to the low-level operating system primitives.
 homepage: https://pkg.go.dev/golang.org/x/sys/unix
-license: other
+license: bsd-3-clause
 licenses:
 - sources: sys@v0.0.0-20210823070655-63515b42dcdf/LICENSE
   text: |