Update License

Transfer ownership to DeNA Co., Ltd.

• update go module (#31)
• use Github Acrtions (#32)

Update pakcage name aelog

changeLog

• Update pakcage name
  • ae-plain-logger -> aelog
• Dealing with Text output
• add example test
• and minor fix

Update middleware signature

this release contains below

• update MwAEPlainLogger signature.
• enrich godoc.
• spancontext moves internal.

ae-plain-logger initial release version

initial release