Upgrade elliptic curve crates; MSRV 1.65 (#1105)

Bumps the following dependencies:

- `ecdsa` v0.16
- `ed25519-dalek` v2.0.0-pre.0
- `k256` v0.13
- `p256` v0.13
- `p384` v0.13

Includes MSRV bumps to Rust 1.65 for crates with these dependencies, and
bumps to Rust 1.60 for other crates in the repo, as that's required to
even be in the same workspace as a crate which uses weak/namespaced
features.

Author: tony-iqlusion

.github/workflows/bip32.yml

@@ -23,7 +23,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.57.0 # MSRV
+          - 1.65.0 # MSRV
           - stable
         target:
           - armv7a-none-eabi
@@ -50,7 +50,7 @@ jobs:
           - macos-latest
           - windows-latest
         toolchain:
-          - 1.57.0 # MSRV
+          - 1.65.0 # MSRV
           - stable
     runs-on: ${{ matrix.platform }}
     steps:

.github/workflows/canonical-path.yml

@@ -25,7 +25,7 @@ jobs:
           - macos-latest
           - windows-latest
         toolchain:
-          - 1.56.0 # MSRV
+          - 1.60.0 # MSRV
           - stable
     runs-on: ${{ matrix.platform }}
     steps:

.github/workflows/hkd32.yml

@@ -22,7 +22,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.57.0 # MSRV
+          - 1.60.0 # MSRV
           - stable
         target:
           - armv7a-none-eabi
@@ -49,7 +49,7 @@ jobs:
           - macos-latest
           - windows-latest
         toolchain:
-          - 1.57.0 # MSRV
+          - 1.60.0 # MSRV
           - stable
     runs-on: ${{ matrix.platform }}
     steps:

.github/workflows/iqhttp.yml

@@ -25,7 +25,7 @@ jobs:
           - macos-latest
           - windows-latest
         toolchain:
-          - 1.56.0 # MSRV
+          - 1.60.0 # MSRV
           - stable
     runs-on: ${{ matrix.platform }}
     steps:

.github/workflows/secrecy.yml

@@ -25,7 +25,7 @@ jobs:
           - macos-latest
           - windows-latest
         toolchain:
-          - 1.56.0 # MSRV
+          - 1.60.0 # MSRV
           - stable
     runs-on: ${{ matrix.platform }}
     steps:

.github/workflows/signatory.yml

@@ -24,7 +24,7 @@ jobs:
           - macos-latest
           - windows-latest
         toolchain:
-          - 1.57.0 # MSRV
+          - 1.65.0 # MSRV
           - stable
     runs-on: ${{ matrix.platform }}
     steps:

.github/workflows/subtle-encoding.yml

@@ -25,7 +25,7 @@ jobs:
           - macos-latest
           - windows-latest
         toolchain:
-          - 1.56.0 # MSRV
+          - 1.60.0 # MSRV
           - stable
     runs-on: ${{ matrix.platform }}
     steps:

.github/workflows/workspace.yml

@@ -25,7 +25,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.57.0 # MSRV
+          toolchain: 1.68.0 # MSRV
           components: clippy
           override: true
           profile: minimal