Ensure replacement values are properly quoted

[jeromefroe]

Fixes #109

[codecov]

Codecov Report

Merging #110 into master will decrease coverage by 0.43%.
The diff coverage is 50%.

@@            Coverage Diff             @@
##           master     #110      +/-   ##
==========================================
- Coverage   93.77%   93.34%   -0.44%     
==========================================
  Files           9        9              
  Lines         418      421       +3     
==========================================
+ Hits          392      393       +1     
- Misses         16       17       +1     
- Partials       10       11       +1

Impacted Files	Coverage Δ
expand.go	98.24% <50%> (-1.76%)	⬇️

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[jeromefroe]

As @prashantv pointed out in #109 this approach will result in integer values being quoted also which isn't what we want. I'll look into the problem further to see if there is a solution we can find for both integers and strings that must be quoted.

[jeromefroe]

This approach doesn't work and I was able to change the value in question in our case such that the new value doesn't need to be quoted.