Update askama requirement from 0.13.0 to 0.14.0 (#286) #472

Job	Run time
Code Coverage	7s
Build Wasm Examples (wasm-yew-minimal)	46s
Clippy	2m 54s
Build Examples (3d_charts)	33s
Rustfmt	14s
Build Examples (basic_charts)	24s
semver	42s
Tests (ubuntu-latest)	1m 59s
Build Examples (custom_controls)	21s
Tests (windows-latest)	4m 33s
Build Examples (financial_charts)	23s
Tests (macos-latest)	1m 41s
Build Examples (images)	39s
Build Examples (kaleido)	1m 14s
Build Examples (maps)	26s
Build Examples (ndarray)	33s
Build Examples (scientific_charts)	26s
Build Examples (shapes)	28s
Build Examples (subplots)	26s
	18m 49s

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