[Test Templates]: Tracking Issue for Practice Exercises

Tracking issue for JinJa Test Templates. No rush, just something we should chip away at. 🙂
I **think** I've checked off all the merged templates, but may have missed some.

- [x] beer-song(deprecated)
- [x] fizz-buzz(deprecated)
- [x] vehicle-purchase(deprecated)
- [x] acronym
- [x] all-your-base
- [x] allergies
- [x] anagram
- [x] armstrong-numbers
- [x] atbash-cipher
- [x] binary-search
- [x] bob
- [x] bottle-song
- [ ] change
- [ ] clock
- [x] collatz-conjecture
- [ ] complex-numbers
- [x] crypto-square (💥 -no template for now)
- [x] darts
- [x] diamond
- [x] difference-of-squares
- [ ] dnd-character
- [x] eliuds-eggs
- [x] etl
- [x] flatten-array
- [ ] food-chain
- [ ] game-of-life
- [x] gigasecond
- [x] grains
- [x] hamming
- [x] hello-world (NA - **no template needed**)
- [x] high-scores
- [ ] house
- [x] isbn-verifier
- [x] isogram
- [ ] killer-sudoku-helper
- [ ] kindergarten-garden
- [ ] knapsack
- [x] largest-series-product
- [x] leap
- [ ] list-ops
- [x] luhn
- [ ] matching-brackets
- [ ] matrix
- [ ] nth-prime
- [ ] nucleotide-count
- [ ] palindrome-products
- [x] pangram
- [ ] pascals-triangle
- [x] perfect-numbers
- [ ] phone-number
- [ ] pig-latin
- [x] prime-factors
- [x] protein-translation
- [ ] proverb
- [ ] pythagorean-triplet
- [ ] queen-attack
- [ ] rail-fence-cipher
- [x] raindrops
- [x] resistor-color
- [ ] resistor-color-duo
- [ ] resistor-color-trio
- [x] reverse-string
- [ ] rna-transcription
- [ ] robot-name
- [ ] robot-simulator
- [x] roman-numerals
- [ ] rotational-cipher
- [ ] run-length-encoding
- [ ] saddle-points
- [ ] say
- [ ] scrabble-score
- [ ] secret-handshake
- [ ] series
- [ ] sieve
- [ ] simple-cipher
- [x] space-age
- [ ] square-root
- [ ] strain
- [ ] sublist
- [ ] sum-of-multiples
- [x] tournament (💥 no template for now)
- [x] triangle
- [ ] twelve-days
- [ ] two-fer
- [ ] variable-length-quantity
- [ ] word-count
- [x] zebra-puzzle (no template needed)

For (💥 ) exercises, see [Issue 474](https://github.com/exercism/r/issues/474)