Convert imperative rendering inside scriptlets to dynamic tags

[DylanPiercey]

Description

This builds on top of #1165 and adds the same imperative rendering => dynamic tag transform within scriptlets where possible. This does not account for every scenario but the most prominent ones.

1. $ input.renderBody(out) => <${input}/>
2. $ input.renderThing(out) => <${input.renderThing}/>
3. $ input.renderBody(out, attrs) => <${input} ...attrs/>
4. $ renderBody(out) => <${renderBody}/>
5. $ input.template.render({}, out) => <${input.template} ...{}/>
6. $ input.template.renderer({}, out) => <${input.template} ...{}/>
7. $ input.barRenderer({}, out) => <${{ render:input.barRenderer }} ...{}/>
8. $ input.barRenderer({}, true, out) => <${(out) => input.barRenderer({}, true, out)}/>

Checklist:

• I have read the CONTRIBUTING document and have signed (or will sign) the CLA.
• I have updated/added documentation affected by my changes.
• I have added tests to cover my changes.

[coveralls]

Coverage increased (+0.1%) to 90.537% when pulling ae64f39 on scriptlet-imperative-rendering-migration into 3e6b954 on master.

[codecov]

Codecov Report

Merging #1174 into master will increase coverage by 0.09%.
The diff coverage is 97.95%.

@@            Coverage Diff             @@
##           master    #1174      +/-   ##
==========================================
+ Coverage   90.43%   90.53%   +0.09%     
==========================================
  Files         311      313       +2     
  Lines       11827    11899      +72     
==========================================
+ Hits        10696    10773      +77     
+ Misses       1131     1126       -5

Impacted Files	Coverage Δ
src/taglibs/core/util/renderCallToDynamicTag.js	100% <100%> (ø)
src/taglibs/core/invoke-tag.js	80.95% <100%> (-6.93%)	⬇️
src/compiler/util/parseJavaScript.js	85.31% <100%> (+2.39%)	⬆️
src/taglibs/core/root-transformer.js	94.28% <94.28%> (ø)
src/compiler/ast/Macro.js	94.44% <0%> (+5.55%)	⬆️
src/compiler/ast/HtmlComment.js	76.47% <0%> (+5.88%)	⬆️
src/compiler/ast/ContainerNode.js	100% <0%> (+16.66%)	⬆️
src/compiler/ast/ElseIf.js	85.71% <0%> (+21.42%)	⬆️

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