Use anchor v0.4.1 (#2)

Author: armaniferrante

.travis.yml

@@ -1,16 +1,21 @@
 dist: bionic
 language: rust
 rust:
-  - nightly
+  - stable
 env:
-  - NODE_VERSION="14.7.0"
+  global:
+    - NODE_VERSION="v14.7.0"
+    - SOLANA_VERSION="v1.6.3"
+    - ANCHOR_VERSION="v0.4.1"
 
 before_deploy:
   - anchor build --verifiable
   - echo "### SHA256 Checksums" > release_notes.md
   - sha256sum target/deploy/multisig.so > binary.txt
   - sha256sum target/idl/multisig.json > idl.txt
   - cat *.txt >> release_notes.md
+  - echo "" >> release_notes.md
+  - echo "Built with Anchor [${ANCHOR_VERSION}](https://github.com/project-serum/anchor/releases/tag/${ANCHOR_VERSION})." >> release_notes.md
 
 deploy:
   provider: releases
@@ -31,11 +36,11 @@ _defaults: &defaults
   - npm install -g mocha
   - npm install -g @project-serum/anchor
   - sudo apt-get install -y pkg-config build-essential libudev-dev
-  - sh -c "$(curl -sSfL https://release.solana.com/v1.5.5/install)"
+  - sh -c "$(curl -sSfL https://release.solana.com/${SOLANA_VERSION}/install)"
   - export PATH="/home/travis/.local/share/solana/install/active_release/bin:$PATH"
-  - export NODE_PATH="/home/travis/.nvm/versions/node/v$NODE_VERSION/lib/node_modules/:$NODE_PATH"
+  - export NODE_PATH="/home/travis/.nvm/versions/node/${NODE_VERSION}/lib/node_modules/:${NODE_PATH}"
   - yes | solana-keygen new
-  - cargo install --git https://github.com/project-serum/anchor anchor-cli --locked
+  - cargo install --git https://github.com/project-serum/anchor --tag ${ANCHOR_VERSION} anchor-cli --locked
 
 jobs:
   include:

Cargo.lock

@@ -15,4 +15,4 @@ cpi = ["no-entrypoint"]
 default = []
 
 [dependencies]
-anchor-lang = "0.3.0"
+anchor-lang = "0.4.1"

programs/multisig/Cargo.toml

@@ -17,8 +17,6 @@
 //! the `execute_transaction`, once enough (i.e. `threhsold`) of the owners have
 //! signed.
 
-#![feature(proc_macro_hygiene)]
-
 use anchor_lang::prelude::*;
 use anchor_lang::solana_program;
 use anchor_lang::solana_program::instruction::Instruction;