Implement copy! for records

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.21 :tada:

Comparison is base (4e2db69) 90.82% compared to head (18f21db) 91.04%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #99 +/- ## ========================================== + Coverage 90.82% 91.04% +0.21% ========================================== Files 15 15 Lines 676 692 +16 ========================================== + Hits 614 630 +16 Misses 62 62 ``` | Flag | Coverage Δ | | |---|---|---| | unittests | `91.04% <100.00%> (+0.21%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=BioJulia#carryforward-flags-in-the-pull-request-comment) to find out more. | [Impacted Files](https://codecov.io/gh/BioJulia/FASTX.jl/pull/99?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=BioJulia) | Coverage Δ | | |---|---|---| | [src/fasta/record.jl](https://codecov.io/gh/BioJulia/FASTX.jl/pull/99?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=BioJulia#diff-c3JjL2Zhc3RhL3JlY29yZC5qbA==) | `84.37% <100.00%> (+2.23%)` | :arrow_up: | | [src/fastq/record.jl](https://codecov.io/gh/BioJulia/FASTX.jl/pull/99?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=BioJulia#diff-c3JjL2Zhc3RxL3JlY29yZC5qbA==) | `95.32% <100.00%> (+0.37%)` | :arrow_up: |

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