Update CI to use MSRV of 1.36.0

The README.md was previously updated due to the dependency on `nix` with PR rust-embedded#42

Author: dfrankland

.github/bors.toml

@@ -4,5 +4,5 @@ required_approvals = 1
 status = [
   "CI (stable, x86_64-unknown-linux-gnu)",
   "CI (stable, armv7-unknown-linux-gnueabihf)",
-  "CI (1.35.0, x86_64-unknown-linux-gnu)",
+  "CI (1.36.0, x86_64-unknown-linux-gnu)",
 ]

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
 
         include:
           # Test MSRV
-          - rust: 1.35.0
+          - rust: 1.36.0
             TARGET: x86_64-unknown-linux-gnu
 
           # Test nightly but don't fail
@@ -31,7 +31,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
-      
+
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal