Merge #1160

1160: build(deps): bump ecdsa_fun from `8b2f301` to `9e5e193` r=delta1 a=dependabot[bot]

Bumps [ecdsa_fun](https://github.com/LLFourn/secp256kfun) from `8b2f301` to `9e5e193`.
<details>
<summary>Commits</summary>
<ul>
<li><a href="9e5e193347"><code>9e5e193</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/LLFourn/secp256kfun/issues/126">#126</a> from LLFourn/actions-faster</li>
<li><a href="fba95f753a"><code>fba95f7</code></a> Try and speed up actions a bit</li>
<li><a href="9602872f19"><code>9602872</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/LLFourn/secp256kfun/issues/122">#122</a> from LLFourn/llfourn-frost</li>
<li><a href="f0cb2d0fbe"><code>f0cb2d0</code></a> Frost reuse message in test and some docs grammar (<a href="https://github-redirect.dependabot.com/LLFourn/secp256kfun/issues/123">#123</a>)</li>
<li><a href="5826a0906f"><code>5826a09</code></a> [frost] <a href="https://github.com/llfourn"><code>`@​llfourn</code></a>` first pass</li>
<li><a href="88f301bc90"><code>88f301b</code></a> Make all Public points Copy</li>
<li><a href="f972dd473f"><code>f972dd4</code></a> Make <code>From\&lt;u32&gt;</code> work for <code>Scalar</code> regardless of secrecy</li>
<li><a href="0ef28db36a"><code>0ef28db</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/LLFourn/secp256kfun/issues/120">#120</a> from LLFourn/assign_ops</li>
<li><a href="0ddb1b8848"><code>0ddb1b8</code></a> Add assignment operators</li>
<li><a href="1f4dab2b5b"><code>1f4dab2</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/LLFourn/secp256kfun/issues/118">#118</a> from LLFourn/vendor-k256</li>
<li>Additional commits viewable in <a href="8b2f3012e1...9e5e193347">compare view</a></li>
</ul>
</details>
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Cargo.lock

@@ -980,7 +980,7 @@ checksum = "5caaa75cbd2b960ff1e5392d2cfb1f44717fffe12fc1f32b7b5d1267f99732a6"
 [[package]]
 name = "ecdsa_fun"
 version = "0.7.1"
-source = "git+https://github.com/LLFourn/secp256kfun#8b2f3012e151cbab5296ec3bdc4510d3404dad75"
+source = "git+https://github.com/LLFourn/secp256kfun#9e5e193347bcffc086d35fa5d8a5a1d5081adf64"
 dependencies = [
  "bincode",
  "rand_chacha 0.3.1",
@@ -3428,27 +3428,15 @@ dependencies = [
 [[package]]
 name = "secp256kfun"
 version = "0.7.1"
-source = "git+https://github.com/LLFourn/secp256kfun#8b2f3012e151cbab5296ec3bdc4510d3404dad75"
+source = "git+https://github.com/LLFourn/secp256kfun#9e5e193347bcffc086d35fa5d8a5a1d5081adf64"
 dependencies = [
  "digest 0.10.5",
  "rand_core 0.6.2",
  "secp256k1",
- "secp256kfun_k256_backend",
  "serde",
  "subtle-ng",
 ]
 
-[[package]]
-name = "secp256kfun_k256_backend"
-version = "2.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "007b33ee2c671688cc9a6b400428440aac4af0d6bc517c4f71477f783fcee18d"
-dependencies = [
- "cfg-if 1.0.0",
- "generic-array",
- "subtle-ng",
-]
-
 [[package]]
 name = "security-framework"
 version = "2.3.1"
@@ -3637,7 +3625,7 @@ dependencies = [
 [[package]]
 name = "sigma_fun"
 version = "0.4.1"
-source = "git+https://github.com/LLFourn/secp256kfun#8b2f3012e151cbab5296ec3bdc4510d3404dad75"
+source = "git+https://github.com/LLFourn/secp256kfun#9e5e193347bcffc086d35fa5d8a5a1d5081adf64"
 dependencies = [
  "curve25519-dalek-ng",
  "digest 0.10.5",