Bump axum from 0.6.15 to 0.6.18

[dependabot[bot]]

Bumps axum from 0.6.15 to 0.6.18.

Release notes

Sourced from axum's releases.

axum - v0.6.18

• fixed: Don't remove the Sec-WebSocket-Key header in WebSocketUpgrade (#1972)

#1972: tokio-rs/axum#1972

axum - v0.6.17

• fixed: Fix fallbacks causing a panic on CONNECT requests (#1958)

#1958: tokio-rs/axum#1958

axum - v0.6.16

• fixed: Don't allow extracting MatchedPath in fallbacks (#1934)
• fixed: Fix panic if Router with something nested at / was used as a fallback (#1934)
• added: Document that Router::new().fallback(...) isn't optimal (#1940)

#1934: tokio-rs/axum#1934 #1940: tokio-rs/axum#1940

Commits

• 79ea274 Release axum 0.6.18 (#1973)
• 9c5f4eb Don't remove the Sec-WebSocket-Key header in WebSocketUpgrade (#1972)
• b7baac2 Release axum 0.6.17 (#1962)
• d22c168 Fix fallback panic on CONNECT requests (#1958)
• 5f51b5b Fix cargo deny (#1959)
• 287ae64 Add springtime-web-axum to ECOSYSTEM.md (#1949)
• c31bea2 Release axum and axum-extra (#1942)
• 994492d Add test for not hitting debug_assert in MatchedPath (#1935)
• b42897f Document that Router::new().fallback(...) isn't optimal (#1940)
• 2c87d65 Don't allow extracting MatchedPath in fallbacks (#1934)
• Additional commits viewable in compare view

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[dependabot[bot]]

Looks like axum is up-to-date now, so this is no longer needed.