Introduce checked functions for pushing, joining, and switching encod… #87

Job	Run time
Verify code formatting (windows-latest)	45s
Test Rust stable (windows-latest, x86_64-pc-windows-msvc --all-features)	1m 55s
Verify code formatting (ubuntu-latest)	8s
Test Rust stable (windows-latest, x86_64-pc-windows-msvc --no-default-features)	1m 12s
Run examples using Rust stable (ubuntu-latest)	12s
Test Rust stable (macos-latest, --all-features)	1m 11s
Lint with clippy (windows-latest, --all-features)	54s
Test Rust stable (macos-latest, --no-default-features)	34s
Lint with clippy (windows-latest, --no-default-features)	54s
Test Rust stable (ubuntu-latest, --all-features)	37s
Lint with clippy (ubuntu-latest, --all-features)	6s
Test Rust stable (ubuntu-latest, --no-default-features)	24s
Lint with clippy (ubuntu-latest, --no-default-features)	12s
Test Rust stable (ubuntu-latest, wasm32-unknown-unknown --all-features)	11s
Test Rust stable (ubuntu-latest, wasm32-unknown-unknown --no-default-features)	15s
Test Rust 1.58.1 (ubuntu-latest, --all-features)	32s
Test Rust 1.58.1 (ubuntu-latest, --no-default-features)	42s
	10m 44s

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