1.9.1 / 2021.04.20

• feat(lsp, unstable): Implement textDocument/documentSymbol (#9981)
• feat(lsp, unstable): implement textDocument/prepareCallHierarchy (#10061)
• feat(lsp, unstable): Implement textDocument/semanticTokens/full (#10233)
• feat(lsp, unstable): improve diagnostic status page (#10253)
• fix: revert changes to Deno.Conn type (#10255)
• fix(lsp): handle x-typescript-types header on type only imports properly (#10261)
• fix(lsp): remove documents when closed (#10254)
• fix(runtime): correct URL in Request (#10256)
• fix(runtime): handle race condition in postMessage where worker has terminated (#10239)
• fix(runtime): hang during HTTP server response (#10197)
• fix(runtime): include HTTP ops in WebWorker scope (#10207)

Release notes for std version 0.94.0: https://github.com/denoland/deno_std/releases/tag/0.94.0