Use rust 1.39.0

Author: Seulgi Kim

.github/workflows/build.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.37.0
+          toolchain: 1.39.0
           override: true
       - run: cargo fetch --verbose
       - run: cargo build --release

.github/workflows/cargo-test.yml

@@ -38,7 +38,7 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.37.0
+          toolchain: 1.39.0
           override: true
       - run: cargo fetch --verbose
       - run: cargo build

.travis.yml

@@ -1,6 +1,6 @@
 language: rust
 rust:
-  - 1.37.0
+  - 1.39.0
 stages:
   - name: test
     if: branch != docker-build

README.md

@@ -73,7 +73,7 @@ With the methods above, node organizers can manage their local persistent data u
 ### Building From Source
 
 #### Build Dependencies
-CodeChain requires Rust version 1.37.0 to build. Using [rustup](https://rustup.rs/ "rustup URL") is recommended.
+CodeChain requires Rust version 1.39.0 to build. Using [rustup](https://rustup.rs/ "rustup URL") is recommended.
 
 - For Linux Systems:
   - Ubuntu

rust-toolchain

@@ -1 +1 @@
-1.37.0
+1.39.0