Although not explicitly specified in RFC 9111, allow GET, HEAD, OPTIONS, and TRACE methods, which are specified as safe methods in RFC 9110.

[k1LoW]

Fix #26

[github-actions]

Code Metrics Report

	main (ddcdad8)	#27 (e6812d8)	+/-
Coverage	82.1%	82.1%	0.0%
Code to Test Ratio	1:2.1	1:2.1	-0.0
Test Execution Time	34s	34s	0s

Details

  |                     | main (ddcdad8) | #27 (e6812d8) | +/-  |
  |---------------------|----------------|---------------|------|
  | Coverage            |          82.1% |         82.1% | 0.0% |
  |   Files             |              3 |             3 |    0 |
  |   Lines             |            234 |           234 |    0 |
  |   Covered           |            192 |           192 |    0 |
- | Code to Test Ratio  |          1:2.1 |         1:2.1 | -0.0 |
  |   Code              |            536 |           538 |   +2 |
  |   Test              |           1119 |          1119 |    0 |
  | Test Execution Time |            34s |           34s |   0s |

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Reported by octocov